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St52-3 carbon steel Older/Alternative Grades

baoliironsteel.com — Tue, 30 Sep 2025 12:49:36 +0000

St52-3 Carbon Steel: Older/Alternative Grades

St52-3 carbon steel, formerly designated under the DIN 17100 standard (now superseded by EN 10025-2 as S355J2), is a versatile low-alloy structural steel known for its high strength, good weldability, and toughness. With a carbon content typically around 0.20-0.22%, it offers excellent mechanical properties suitable for heavy-duty applications in construction, machinery, and engineering. This article explores its chemical composition, mechanical properties, manufacturing processes, applications, and comparisons with related grades.

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1. Core Chemical Composition (DIN 17100/EN 10025-2 Equivalent)

Element	Content Range	Function
Carbon (C)	≤ 0.22%	Enhances strength and hardness; controlled to maintain weldability
Silicon (Si)	≤ 0.55%	Improves strength and oxidation resistance during heat treatment
Manganese (Mn)	0.50 – 1.50%	Boosts tensile strength and deoxidizes the melt; aids in hot working
Phosphorus (P)	≤ 0.045%	Limited to prevent brittleness and ensure ductility
Sulfur (S)	≤ 0.045%	Controlled to avoid hot shortness and improve machinability
Chromium (Cr)	≤ 0.30%	Optional trace element; enhances hardenability and corrosion resistance
Niobium (Nb)	≤ 0.05%	Micro-alloying for grain refinement and improved toughness

2. Key Mechanical Properties (Room Temperature)

Tensile Strength (Rm): 510 – 680 MPa (high load-bearing capacity for structural use)
Yield Strength (Re): ≥ 355 MPa (for thicknesses ≤ 16mm; ensures deformation resistance)
Elongation (A5): ≥ 22% (good ductility for forming and impact absorption)
Impact Toughness (KV): ≥ 27 J at -20°C (Charpy V-notch; suitable for moderate cold environments)
Hardness (HB): 146 – 187 (Brinell; machinable with standard tools)

3. Manufacturing Process Characteristics

Smelting: Basic oxygen furnace (BOF) or electric arc furnace (EAF) with ladle refining to achieve low impurity levels and fine grain structure.
Hot Rolling: Controlled at 850-1100°C, followed by normalized rolling to refine microstructure and improve uniformity.
Heat Treatment: Normalizing at 880-950°C with air cooling to relieve stresses and enhance toughness; optional quenching and tempering for higher strength variants.
Cold Forming: Possible for thinner sections with annealing at 650-700°C to restore ductility after deformation.
Surface Treatment: Pickling in hydrochloric acid to remove scale; optional shot blasting or priming for corrosion protection in outdoor applications.

4. Typical Application Fields

Construction and Infrastructure

Structural beams, columns, bridges, and building frameworks — provides reliable strength-to-weight ratio for load-bearing elements.

Machinery and Equipment

Heavy machine bases, crane components, conveyor frames, and agricultural implements — withstands dynamic loads and vibrations.

Automotive and Transportation

Chassis parts, trailer frames, and railway components — balances durability with weldability for fabrication.

Pressure Vessels and Piping

Low to medium-pressure boilers, pipelines, and storage tanks — meets standards like EN 10025 for general engineering uses.

5. Difference from Similar Grades (St52-3 vs St37-2 vs St60-2)

Grade	Yield Strength	Key Advantage	Suitable Scenario
St52-3	≥ 355 MPa	High strength with good toughness; weldable	General structural and mechanical applications
St37-2	≥ 235 MPa	Lower cost; excellent formability	Light-duty construction and non-critical supports
St60-2	≥ 460 MPa	Superior strength for compact designs	High-stress components like heavy machinery parts

6. Selection & Usage Precautions

Corrosion Protection: Not inherently corrosion-resistant; apply coatings or galvanizing for outdoor or humid environments to prevent rusting.
Welding Guidelines: Preheat to 150-200°C for thicknesses >20mm; use low-hydrogen electrodes (e.g., E7018) to avoid cracking; post-weld heat treatment if required.
Machining Considerations: Use coolant and sharp tools; moderate cutting speeds to manage tool wear due to manganese content.
Quality Assurance: Verify compliance with DIN 17100 or EN 10025-2 via mill certificates; perform ultrasonic testing for internal defects in critical sections.

7. Get a Carbon Steel Quote

If you need customized St52-3 carbon steel products (plates, sections, bars) or want to get a detailed price quote, please contact our team directly. Our specialists will provide professional technical support and competitive pricing based on your requirements.

St37-2 carbon steel Older/Alternative Grades

baoliironsteel.com — Tue, 30 Sep 2025 12:49:30 +0000

St37-2 Carbon Steel: Older/Alternative Grades for Structural and General Applications

St37-2 carbon steel, a non-alloy structural steel under the DIN EN 10025-2 standard (equivalent to S235JR in modern nomenclature), is a versatile low-carbon grade widely used in construction and engineering. With its mild composition featuring a maximum carbon content of 0.17%, it offers good weldability, machinability, and moderate strength, making it suitable for load-bearing structures, pipes, and machinery components. This article explores its chemical composition, mechanical properties, production processes, applications, and comparisons with alternative grades.

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1. Core Chemical Composition (DIN EN 10025-2 Standard)

Element	Content Range	Function
Carbon (C)	≤ 0.17%	Provides basic strength; low content ensures good weldability and ductility
Manganese (Mn)	≤ 1.40%	Improves strength, toughness, and hardenability; aids in deoxidation
Phosphorus (P)	≤ 0.045%	Controlled impurity; limits brittleness and cold shortness
Sulfur (S)	≤ 0.045%	Restricted to enhance hot workability and prevent hot shortness
Nitrogen (N)	≤ 0.009%	Minimizes aging effects and improves impact toughness
Silicon (Si)	≤ 0.55%	Acts as a deoxidizer; supports strength without reducing ductility

2. Key Mechanical Properties (Room Temperature, Thickness ≤16mm)

Yield Strength (ReH): ≥ 235 MPa (adequate for structural beams and frames)
Tensile Strength (Rm): 360-510 MPa (balances strength and formability)
Elongation (A): ≥ 25% (high ductility for bending and fabrication)
Impact Toughness (KV): ≥ 27 J at 20°C (Charpy V-notch; suitable for moderate impact loads)
Hardness (HB): ≤ 120-170 (Brinell; easy machinability for general purposes)

3. Manufacturing Process Characteristics

Smelting: Basic oxygen furnace (BOF) or electric arc furnace (EAF) with ladle refining to control impurities and achieve homogeneous composition.
Hot Rolling: Rolled at 900-1100°C to form plates, sections, or bars; controlled cooling to normalize microstructure and avoid excessive grain growth.
Heat Treatment: Normalizing at 850-900°C followed by air cooling to refine grain structure and enhance uniformity for structural use.
Cold Forming: For thinner sections, cold drawing or bending with minimal springback due to low yield strength.
Surface Treatment: Pickling in acid solutions to remove scale; optional galvanizing for corrosion protection in outdoor applications.

4. Typical Application Fields

Construction & Infrastructure

Structural beams, columns, bridges, and building frameworks — provides reliable support in non-corrosive to mildly corrosive environments.

Piping & Mechanical

Pressure vessels, boiler tubes, automotive chassis parts, and machinery frames — excellent weldability for assembly.

General Fabrication

Storage tanks, conveyor systems, agricultural equipment, and shipbuilding components — cost-effective for moderate-duty uses.

Heavy Equipment

Crane booms, earthmoving machinery parts, and transmission towers — durable for dynamic loading conditions.

5. Differences from Similar/Alternative Grades (St37-2 vs S235JR vs ASTM A36)

Grade	Key Specification	Yield Strength	Suitable Scenario
St37-2 (DIN 17100)	Older German standard; C ≤ 0.17%	≥ 235 MPa	Legacy structural projects; general European fabrication
S235JR (EN 10025-2)	Modern EU equivalent; similar composition	≥ 235 MPa	Current structural steel for welding and forming; bridges and buildings
ASTM A36 (US)	High-strength low-alloy; C ≤ 0.26%	≥ 250 MPa	American construction; higher strength for riveted or bolted assemblies

6. Selection & Usage Precautions

Environmental Limitations: Not ideal for highly corrosive settings (e.g., marine or acidic); opt for galvanized or higher-alloy alternatives like S355.
Welding Guidelines: Preheat to 100-150°C for thicknesses >20mm; use low-hydrogen electrodes (E7018) to prevent cracking.
Fatigue & Load Considerations: Suitable for static loads; for cyclic fatigue, perform stress-relief annealing post-fabrication.
Quality Assurance: Verify with material certificates (EN 10204 3.1) ensuring compliance with DIN EN 10025-2 mechanical and chemical specs.

7. Get a Carbon Steel Quote

For customized St37-2 carbon steel products (plates, sections, bars) or competitive pricing, contact our team. We offer expert advice tailored to your project needs.

P265GH carbon steel Pressure Vessel Steels (EN 10028-2)

baoliironsteel.com — Tue, 30 Sep 2025 12:49:26 +0000

P265GH Carbon Steel: Pressure Vessel Steels (EN 10028-2)

P265GH carbon steel, designated under EN 10028-2 for flat products in pressure vessel applications, is a non-alloy quality steel widely used for welded structures requiring moderate strength and good weldability. With its controlled chemical composition, it offers reliable performance in moderate-temperature environments, making it ideal for boilers, pressure vessels, and piping systems. This article explores its chemical makeup, mechanical properties, manufacturing processes, applications, and comparative advantages.

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1. Core Chemical Composition (EN 10028-2 Standard)

Element	Content Range	Function
Carbon (C)	0.08 – 0.20%	Provides basic strength and hardenability; controlled to ensure weldability
Manganese (Mn)	0.80 – 1.40%	Improves strength, toughness, and deoxidation; enhances hot workability
Silicon (Si)	≤ 0.40%	Aids in deoxidation and improves high-temperature scaling resistance
Phosphorus (P)	≤ 0.025%	Limited impurity; excess reduces ductility and increases brittleness
Sulfur (S)	≤ 0.015%	Controlled to minimize hot shortness and ensure good weldability
Chromium (Cr)	≤ 0.30%	Trace element; slight enhancement of corrosion resistance
Molybdenum (Mo)	≤ 0.08%	Improves creep strength at elevated temperatures

2. Key Mechanical Properties (Room Temperature)

Tensile Strength (Rm): 410 – 530 MPa (EN 10028-2 normalized condition)
Yield Strength (ReH): ≥ 265 MPa (minimum for thicknesses up to 16 mm; ensures pressure containment)
Elongation (A): ≥ 22% (good ductility for forming and fabrication)
Impact Toughness (KV): ≥ 27 J at 20°C (longitudinal; suitable for moderate impact loads)
Hardness (HB): ≤ 170 (Brinell; facilitates machining and welding)

3. Manufacturing Process Characteristics

Steelmaking: Basic oxygen furnace (BOF) or electric arc furnace (EAF) followed by ladle refining to achieve low impurity levels and consistent composition.
Hot Rolling: Rolled at 900-1100°C into plates or sheets, with controlled cooling to normalize the microstructure and prevent excessive grain growth.
Heat Treatment: Normalizing at 880-950°C for 1 hour per 25 mm thickness, followed by air cooling to refine grain structure and improve toughness.
Testing and Inspection: Ultrasonic testing (UT) for internal defects, tensile and impact testing per EN 10028-2; optional NDT for weld zones.
Finishing: Edge trimming and surface shot blasting; optional pickling for scale removal to prepare for welding or coating.

4. Typical Application Fields

Pressure Vessels and Boilers

Shells, heads, and drums for steam boilers, hot water tanks, and chemical reactors operating up to 400°C and moderate pressures.

Piping and Fittings

Welded pipes, flanges, and valves for medium-pressure steam lines, heating systems, and industrial fluid transport.

Power Generation

Components in thermal power plants, including superheater tubes and economizers, compliant with PED 2014/68/EU directives.

General Industrial

Storage tanks, heat exchangers, and structural parts in petrochemical and manufacturing sectors requiring weldable, cost-effective steel.

5. Difference from Similar Grades (P265GH vs P295GH vs P355GH)

Grade	Yield Strength (ReH)	Key Advantage	Suitable Scenario
P265GH	≥ 265 MPa	Excellent weldability and moderate strength; cost-effective	Low to medium pressure vessels up to 400°C
P295GH	≥ 295 MPa	Higher strength for thicker sections; better creep resistance	Medium-pressure boilers and higher load applications
P355GH	≥ 355 MPa	Superior tensile properties; enhanced toughness	High-pressure equipment and elevated temperature service

6. Selection & Usage Precautions

Temperature Limits: Suitable for service up to 450°C; avoid prolonged exposure above 400°C to prevent graphitization and loss of strength — consider alloyed grades for higher temperatures.
Welding Guidelines: Preheat to 150-200°C for thicknesses >20 mm; use low-hydrogen electrodes (e.g., E7018) and post-weld heat treatment if required to minimize cold cracking.
Corrosion Protection: Susceptible to atmospheric corrosion; apply protective coatings or galvanizing for outdoor use; not recommended for highly corrosive environments without additional alloys.
Quality Assurance: Verify compliance with EN 10028-2 via material certificates (EN 10204 3.1); perform hydrostatic testing for pressure vessel applications per ASME or PED standards.

7. Get a Carbon Steel Quote

If you need customized P265GH carbon steel products (plates, sheets, pipes) or want to get a detailed price quote for your pressure vessel projects, please contact our team directly. Our specialists will provide professional technical support and competitive pricing based on your requirements.

P235GH carbon steel Pressure Vessel Steels (EN 10028-2)

baoliironsteel.com — Tue, 30 Sep 2025 12:49:20 +0000

P235GH Carbon Steel: Pressure Vessel Steels (EN 10028-2)

P235GH carbon steel, designated under the EN 10028-2 standard for non-alloy and alloy steels used in elevated temperature pressure vessels, is a normalized or normalized formed and tempered low-carbon steel grade (equivalent to ASTM A516 Grade 55 or BS 3059 Grade 161). With its controlled chemistry and robust mechanical properties, it offers excellent weldability, moderate strength, and good formability, making it ideal for fabricating boilers, pressure vessels, and high-temperature piping systems in power generation, petrochemical, and industrial heating applications. This article explores its chemical composition, mechanical characteristics, manufacturing processes, typical uses, and comparisons with similar grades.

Related product

1. Core Chemical Composition (EN 10028-2 Standard)

Element	Content Range	Function
Carbon (C)	≤ 0.16%	Provides basic strength; low level enhances weldability and ductility
Manganese (Mn)	0.10 – 0.50%	Improves hot workability and toughness; aids in deoxidation
Silicon (Si)	≤ 0.35%	Acts as a deoxidizer; enhances high-temperature strength and scale resistance
Phosphorus (P)	≤ 0.025%	Controlled impurity; minimizes brittleness in welded joints
Sulfur (S)	≤ 0.015%	Restricted to prevent hot shortness and ensure good ductility
Chromium (Cr)	≤ 0.30%	Trace element for minor corrosion resistance in mild environments
Molybdenum (Mo)	≤ 0.08%	Improves creep resistance at elevated temperatures

2. Key Mechanical Properties (Room Temperature)

Tensile Strength (Rm): 360 – 480 MPa (EN 10028-2 requirement for structural integrity under pressure)
Yield Strength (ReH): ≥ 235 MPa (minimum for thicknesses up to 16mm; supports load-bearing in vessels)
Elongation (A): ≥ 25% (longitudinal; indicates good ductility for forming and expansion)
Impact Toughness (KV): ≥ 27 J at 20°C (ensures fracture resistance; optional Charpy V-notch testing)
Hardness (HB): 120 – 170 (suitable for machining and welding without excessive hardness buildup)

3. Manufacturing Process Characteristics

Steelmaking: Basic oxygen furnace (BOF) or electric arc furnace (EAF) followed by ladle refining to achieve low impurity levels and precise chemistry for pressure service.
Hot Rolling: Rolled at 850-1100°C to produce plates or sheets (thicknesses 6-200mm), with controlled cooling to normalize the microstructure and refine grain size.
Heat Treatment: Normalization at 880-950°C followed by air cooling; optional stress-relieving at 550-650°C to minimize residual stresses post-welding.
Surface Preparation: Shot blasting or pickling to remove mill scale; protected with oil coating for storage and transport to prevent corrosion during handling.

4. Typical Application Fields

Power Generation

Boiler drums, steam headers, and superheater tubes — withstands moderate pressures and temperatures up to 450°C in fossil fuel plants.

Petrochemical Industry

Pressure vessels for distillation columns, reactors, and storage tanks handling non-corrosive hydrocarbons and gases.

Oil & Gas Sector

Piping systems, heat exchangers, and separators for upstream and midstream operations under elevated pressures.

Industrial Heating Equipment

Furnace components, hot water tanks, and autoclaves — reliable for thermal cycling and steam generation processes.

5. Difference from Similar Grades (P235GH vs P265GH vs P355GH)

Grade	Yield Strength (MPa)	Key Advantage	Suitable Scenario
P235GH	≥ 235	Superior weldability; cost-effective for low-to-medium pressure	General boilers and vessels up to 16 bar and 400°C
P265GH	≥ 265	Higher strength for thicker sections; improved impact resistance	Medium-pressure applications like steam lines and larger tanks
P355GH	≥ 355	Enhanced tensile properties for high-stress environments	High-pressure vessels and elevated temperature piping systems

6. Selection & Usage Precautions

Temperature Limits: Suitable for service up to 450°C; avoid prolonged exposure above 500°C to prevent graphitization and loss of strength — opt for alloyed grades like 16Mo3 for higher temperatures.
Welding Guidelines: Preheat to 150-200°C for thicknesses >20mm; use low-hydrogen electrodes (e.g., E7018) and post-weld heat treatment if required to avoid hydrogen cracking.
Corrosion Considerations: Provides basic atmospheric protection; apply protective coatings (e.g., epoxy) in humid or mildly corrosive environments; not ideal for acidic or chloride-laden conditions.
Quality Assurance: Verify compliance with EN 10028-2 via material certificates (EN 10204 3.1/3.2); conduct hydrostatic testing per ASME Section VIII for pressure vessels.

7. Get a Carbon Steel Quote

If you need customized P235GH carbon steel products (plates, sheets, pipes, fittings) or want to get a detailed price quote, please contact our team directly. Our specialists will provide professional technical support and competitive pricing based on your requirements.

DC06 carbon steel Cold-Forming Steels (EN 10130)

baoliironsteel.com — Tue, 30 Sep 2025 12:49:01 +0000

DC06 Carbon Steel: Cold-Forming Steels (EN 10130)

DC06 carbon steel, specified under the EN 10130 standard for cold-rolled low-carbon steels, is a high-quality, extra deep-drawing grade designed for exceptional formability in demanding applications. With its ultra-low carbon content and precise alloying, DC06 offers superior ductility, minimal springback, and excellent surface quality, making it ideal for automotive body panels, appliance housings, and precision components. This article explores its chemical composition, mechanical properties, manufacturing processes, applications, and comparative advantages.

Related product

1. Core Chemical Composition (EN 10130 Standard)

Element	Content Range	Function
Carbon (C)	≤ 0.02%	Ultra-low content for maximum ductility and reduced hardening during forming
Manganese (Mn)	≤ 0.25%	Improves hot workability and deoxidizes; supports fine grain structure
Silicon (Si)	≤ 0.03%	Limited to enhance formability; avoids embrittlement in cold working
Phosphorus (P)	≤ 0.025%	Controlled impurity to prevent brittleness and ensure uniform deformation
Sulfur (S)	≤ 0.025%	Minimized to reduce inclusions and improve surface quality post-forming
Titanium (Ti)	≤ 0.300%	Optional micro-alloying for grain refinement and stabilization of microstructure
Iron (Fe)	Balance	Primary matrix for low-alloy structure

2. Key Mechanical Properties (Room Temperature, Typical Values)

Yield Strength (Rp0.2): ≤ 140 MPa (low yield for deep drawing without cracking)
Tensile Strength (Rm): 270 – 350 MPa (balanced strength for structural integrity)
Elongation (A80): ≥ 44% (for thicknesses > 2 mm; exceptional ductility for complex shapes)
r-Value (Lankford Coefficient): ≥ 2.0 (high anisotropy resistance for uniform drawing)
n-Value (Strain Hardening Exponent): ≥ 0.23 (supports progressive forming without necking)
Hardness (HRB): ≤ 65 (Rockwell B; soft for easy cold forming and finishing)

3. Manufacturing Process Characteristics

Steelmaking: Basic oxygen furnace (BOF) or electric arc furnace (EAF) with vacuum degassing to achieve ultra-low carbon and impurity levels for superior cleanliness.
Hot Rolling: Continuous casting into slabs, hot-rolled at 1100-1200°C to 2-4 mm thickness, with controlled cooling to refine microstructure and avoid scale formation.
Cold Rolling: Multi-pass reduction from hot-rolled strip to final gauge (0.3-3.0 mm), with intermediate annealing at 600-750°C to restore ductility and achieve precise thickness tolerance (±0.05 mm).
Annealing: Batch or continuous annealing in a protective atmosphere (N2-H2) at 700-800°C, followed by slow cooling to ensure full recrystallization and optimal formability.
Surface Treatment: Skin-pass rolling for shape control and surface smoothness; optional chemical passivation or phosphating to prevent rust during storage and enhance paint adhesion.

4. Typical Application Fields

Automotive Industry

Inner body panels, fuel tanks, wheel arches, and chassis components — leverages deep-drawability for complex geometries in vehicle manufacturing.

Appliance & Household

Washing machine tubs, refrigerator linings, microwave interiors, and furniture frames — provides smooth surfaces for enameling and corrosion protection.

Electronics & Precision Parts

Computer chassis, electrical enclosures, and stamped casings — ensures minimal distortion in high-volume production with fine surface finish.

General Manufacturing

Deep-drawn containers, tubular parts, and metal packaging — suitable for progressive die forming in cost-effective, high-precision operations.

5. Difference from Similar Grades (DC01 vs DC04 vs DC05 vs DC06)

Grade	Carbon Content	Key Advantage	Suitable Scenario
DC01	≤ 0.12%	Cost-effective general forming	Simple bending and shallow drawing (e.g., brackets, covers)
DC04	≤ 0.06%	Good drawability for medium complexity	Automotive panels and appliance shells with moderate deformation
DC05	≤ 0.035%	Enhanced deep drawing with better r-value	Complex parts like oil pans and structural housings
DC06	≤ 0.02%	Ultra-high ductility for extra deep drawing	Extreme forming like double-action draws in automotive and precision industries

6. Selection & Usage Precautions

Forming Limits: Optimized for single or double deep drawing; avoid excessive strain rates to prevent orange peel or Lüders bands — use lubricant for draws > 2x diameter.
Coating Compatibility: Excellent base for galvanizing, electroplating, or organic coatings; ensure surface cleanliness to avoid adhesion failures in painted applications.
Thickness & Tolerance: Select gauges based on EN 10130 tolerances (IT grades); thinner sheets (<1 mm) for lightweight designs, thicker for rigidity.
Quality Verification: Require EN 10130-compliant certificates with mechanical testing (e.g., ISO 6892-1 for tensile properties) and surface inspection per ISO 497.
Storage & Handling: Protect from moisture to prevent rust; use oiling or plastic wrapping for long-term storage in humid environments.

7. Get a Carbon Steel Quote

If you need customized DC06 carbon steel products (sheets, coils, strips) or want to get a detailed price quote, please contact our team directly. Our specialists will provide professional technical support and competitive pricing based on your requirements.

DC03 carbon steel Cold-Forming Steels (EN 10130)

baoliironsteel.com — Tue, 30 Sep 2025 12:48:53 +0000

DC03 Carbon Steel: Cold-Forming Steels (EN 10130)

DC03 carbon steel, designated under the EN 10130 standard for cold-rolled low-carbon steels suitable for cold forming, is a high-quality, versatile material known for its excellent formability, consistent mechanical properties, and smooth surface finish. With a controlled low carbon content (≤ 0.08%) and additions of manganese and other elements, DC03 offers superior ductility and drawability, making it ideal for deep drawing and complex shaping in automotive, appliance, and general engineering applications. This article explores its chemical composition, mechanical properties, manufacturing processes, applications, and comparative advantages.

Related product

1. Core Chemical Composition (EN 10130 Standard)

Element	Content Range	Function
Carbon (C)	≤ 0.08%	Low content enhances formability and ductility; minimizes work-hardening during cold forming
Manganese (Mn)	≤ 0.40%	Improves hot workability and deoxidizes the steel; supports strength without reducing ductility
Phosphorus (P)	≤ 0.025%	Controlled to prevent brittleness; ensures good cold-forming performance
Sulfur (S)	≤ 0.020%	Limited to avoid inclusions that could impair surface quality and formability
Silicon (Si)	≤ 0.30%	Aids in deoxidation during smelting; contributes to scale formation resistance in hot rolling
Aluminum (Al)	≥ 0.020%	Acts as a deoxidizer; promotes fine grain structure for improved mechanical uniformity

2. Key Mechanical Properties (Room Temperature)

Tensile Strength (Rm): 270 – 410 MPa (EN 10130 standard; balances strength and formability)
Yield Strength (Re): ≤ 210 MPa (high ductility for deep drawing applications)
Elongation (A80): ≥ 38% (excellent uniform elongation for complex shaping)
r-Value (Lankford Coefficient): ≥ 1.8 (indicates superior deep-drawing anisotropy resistance)
n-Value (Strain Hardening Exponent): ≥ 0.21 (ensures even deformation during forming)

3. Manufacturing Process Characteristics

Smelting: Basic oxygen furnace (BOF) or electric arc furnace (EAF) followed by ladle refining and vacuum degassing to achieve low impurity levels and precise chemistry for consistent formability.
Hot Rolling: Slabs reheated to 1200-1250°C, rolled to intermediate gauge (2-4 mm) at 900-1100°C, with controlled cooling to refine microstructure and ensure flatness.
Cold Rolling: Multi-pass reduction from hot-rolled strip to final thickness (0.3-3.0 mm), with intermediate annealing at 650-750°C in a controlled atmosphere to restore ductility and achieve specified surface finishes (e.g., skin-passed for matte or bright).
Annealing: Batch or continuous annealing at 650-800°C in a protective atmosphere (N2-H2) to fully recrystallize the structure, eliminating cold-work effects and optimizing formability parameters.
Surface Treatment: Temper rolling (skin pass) for shape control and surface texture; optional chemical passivation or oiling to prevent corrosion during storage and transport.

4. Typical Application Fields

Automotive Industry

Body panels, chassis components, fuel tanks, and structural parts — high formability supports complex stamping and deep drawing for lightweight vehicle designs.

Household Appliances

Washing machine drums, refrigerator linings, dishwasher tubs, and oven interiors — smooth surface and ductility enable efficient forming and coating adhesion.

General Engineering

Enclosures, brackets, clips, and machinery guards — cost-effective for medium-strength requirements with good weldability and paintability.

Electrical & Furniture

Switchgear housings, office furniture frames, and shelving — consistent properties ensure reliable performance in decorative and functional roles.

5. Difference from Similar Grades (DC03 vs DC01 vs DC04)

Grade	Yield Strength Limit	Key Advantage	Suitable Scenario
DC03	≤ 210 MPa	Balanced formability and strength; good for moderate drawing	Automotive panels, appliance parts requiring medium ductility
DC01	≤ 280 MPa	Higher strength but lower ductility; economical for simple forming	General fabrication, non-critical drawing operations
DC04	≤ 180 MPa	Superior deep-drawing capability; highest r-value	Complex automotive bodywork, deep-drawn containers

6. Selection & Usage Precautions

Forming Limits: Ideal for drawing ratios up to 2.5; avoid excessive strain rates to prevent cracking — test with Erichsen cupping for specific applications.
Coating Compatibility: Excellent for galvanizing or organic coating; ensure proper surface cleanliness to achieve uniform adhesion and corrosion protection.
Welding Requirements: Suitable for resistance spot, MIG, and TIG welding; use low-hydrogen processes to minimize defects in formed assemblies.
Quality Verification: Verify compliance with EN 10130 via mill certificates, including formability tests (r-value, n-value) and surface inspection per ISO 497.

7. Get a Carbon Steel Quote

If you need customized DC03 carbon steel products (sheets, coils, strips) or want to get a detailed price quote, please contact our team directly. Our specialists will provide professional technical support and competitive pricing based on your requirements.

DC01 carbon steel Cold-Forming Steels (EN 10130)

baoliironsteel.com — Tue, 30 Sep 2025 12:48:44 +0000

DC01 Carbon Steel: Cold-Forming Steels for Deep Drawing and Automotive Applications (EN 10130)

DC01 carbon steel, designated under the EN 10130 standard for cold-rolled low-carbon steels suitable for cold forming, is a versatile, high-quality material widely used in industries requiring excellent formability and surface quality. With a maximum carbon content of 0.12%, it offers superior deep drawing capabilities, making it ideal for automotive body panels, appliances, and metal furniture. This article explores its chemical composition, mechanical properties, manufacturing processes, applications, and comparisons with similar grades.

Related product

1. Core Chemical Composition (EN 10130 Standard)

Element	Content Range	Function
Carbon (C)	≤ 0.12%	Low content ensures good formability and ductility; minimizes hardening during cold working
Manganese (Mn)	≤ 0.60%	Improves strength and toughness; aids in deoxidation and hot shortness prevention
Phosphorus (P)	≤ 0.045%	Impurity control; low levels prevent embrittlement and support cold forming
Sulfur (S)	≤ 0.045%	Restricted to avoid hot cracking; ensures clean surface for drawing operations
Silicon (Si)	≤ 0.50%	Enhances strength and oxidation resistance; controlled for optimal workability

2. Key Mechanical Properties (Room Temperature, Typical Values)

Tensile Strength (Rm): 270 – 410 MPa (EN 10130 standard; varies with thickness)
Yield Strength (Re): ≤ 280 MPa for thicknesses ≥ 0.7mm (high initial ductility for forming)
Elongation (A80): ≥ 38% (excellent ductility for deep drawing and bending)
Hardness (HRB): ≤ 65 (Rockwell B; soft for easy cold processing)
r-Value (Lankford Coefficient): ≥ 1.8 (indicates superior deep drawability)

3. Manufacturing Process Characteristics

Smelting: Basic oxygen furnace (BOF) or electric arc furnace (EAF) followed by continuous casting; vacuum degassing to achieve low impurity levels for consistent quality.
Hot Rolling: Slabs heated to 1200-1280°C, rolled to intermediate thickness (2-4mm), and coiled; controlled cooling to refine microstructure and ensure uniform properties.
Cold Rolling: Multi-pass reduction up to 80% with intermediate annealing (650-750°C) in a controlled atmosphere to restore ductility and achieve precise gauges (0.3-3.0mm).
Annealing: Batch or continuous annealing at 660-720°C to produce a soft, recrystallized structure; skin-pass rolling for improved flatness and surface finish.
Surface Treatment: Oiling or phosphating for temporary corrosion protection; optional temper rolling to enhance surface appearance and formability.

4. Typical Application Fields

Automotive Industry

Body panels, chassis components, wheel arches, and inner structures — high formability supports complex stamping and deep drawing processes.

Household Appliances

Washing machine drums, refrigerator linings, oven panels, and dishwasher parts — smooth surface and ductility ideal for curved designs and painting.

Furniture & General Manufacturing

Metal cabinets, shelving, office furniture, and enclosures — cost-effective for high-volume production with good weldability.

Electrical & Packaging

Transformer casings, electrical boxes, and can bodies — excellent for bending, flanging, and corrosion protection in mild environments.

5. Difference from Similar Grades (DC01 vs DC03 vs DC04)

Grade	Carbon Content	Key Advantage	Suitable Scenario
DC01	≤ 0.12%	Balanced formability and strength; economical	General cold forming (simple to moderate drawing operations)
DC03	≤ 0.08%	Higher ductility and r-value for deeper draws	Complex automotive parts and appliances requiring extensive forming
DC04	≤ 0.06%	Superior surface quality and elongation	High-precision drawing, exposed panels, and decorative applications

6. Selection & Usage Precautions

Forming Limits: Optimized for cold forming up to 50% reduction; avoid extreme bending radii below 0.5x thickness to prevent cracking.
Welding Recommendations: Suitable for resistance spot, MIG, and TIG welding; use low-hydrogen electrodes to minimize defects in joints.
Corrosion Protection: Not inherently stainless; apply zinc coating (galvanizing) or painting for outdoor/humid environments to prevent rust.
Quality Verification: Ensure compliance with EN 10130 via mill test certificates; inspect for surface defects like coil breaks or stretcher strains.

7. Get a Carbon Steel Quote

If you need customized DC01 carbon steel products (coils, sheets, strips) or want to get a detailed price quote, please contact our team directly. Our specialists will provide professional technical support and competitive pricing based on your requirements.

C45 carbon steel Non-Alloy Quality Steels (EN 10083 series)

baoliironsteel.com — Tue, 30 Sep 2025 12:48:37 +0000

C45 Carbon Steel: Non-Alloy Quality Steels (EN 10083 Series)

C45 carbon steel, designated under the EN 10083 series for non-alloy quality steels (equivalent to AISI 1045 or SAE 1045), is a medium-carbon steel renowned for its excellent balance of strength, toughness, and machinability. With a carbon content of 0.42-0.50%, it offers superior wear resistance and is widely used in mechanical engineering after appropriate heat treatment. This article explores its chemical composition, mechanical properties, manufacturing processes, applications, and key considerations for optimal use in industrial settings.

Related product

1. Core Chemical Composition (EN 10083-2 Standard)

Element	Content Range	Function
Carbon (C)	0.42 – 0.50%	Provides hardenability and strength; enables quenching to achieve high hardness
Silicon (Si)	≤ 0.40%	Acts as a deoxidizer; enhances strength and elasticity without brittleness
Manganese (Mn)	0.50 – 0.80%	Improves hot workability and tensile strength; counters sulfur effects
Phosphorus (P)	≤ 0.045%	Controlled impurity; higher levels increase brittleness and reduce ductility
Sulfur (S)	≤ 0.045%	Limited for free-cutting variants; in standard C45, minimized to prevent hot shortness
Chromium (Cr)	≤ 0.40%	Residual element; minor contribution to hardenability if present

2. Key Mechanical Properties (Normalized or Quenched & Tempered Condition)

Tensile Strength (Rm): 600 – 850 MPa (varies with heat treatment; higher after quenching and tempering)
Yield Strength (Re): ≥ 355 MPa (minimum for diameters ≤ 100 mm in normalized state)
Elongation (A): ≥ 16% (good ductility for forming and machining)
Hardness (HB): 170 – 210 (as-rolled; up to 250 HB after quenching)
Impact Toughness (KV): ≥ 35 J at room temperature (ensures toughness for dynamic loads)

3. Manufacturing Process Characteristics

Steelmaking: Basic oxygen furnace (BOF) or electric arc furnace (EAF) followed by ladle refining for low impurity levels and precise chemistry control.
Hot Working: Forging or rolling at 850-1200°C to produce bars, billets, or plates; final hot finish above 850°C to maintain uniform microstructure.
Heat Treatment: Normalizing at 870-920°C followed by air cooling; quenching in oil/water at 820-860°C and tempering at 550-650°C for desired hardness and toughness.
Cold Working: Cold drawing for precision bars (up to 20% reduction); annealing at 650-700°C to relieve stresses and improve machinability.
Surface Treatment: Shot blasting or pickling to remove scale; optional phosphating or coating for corrosion protection during storage.

4. Typical Application Fields

Mechanical Components

Gears, shafts, pins, and axles in automotive and machinery — heat-treated for wear resistance and fatigue strength under moderate loads.

Tools & Fasteners

Bolts, nuts, studs, and hand tools — normalized or quenched for reliable fastening in construction and industrial assembly.

Automotive & Transportation

Crankshafts, connecting rods, and suspension parts — normalized condition for balanced strength and machinability.

General Engineering

Chains, sprockets, and structural fittings — cost-effective for non-corrosive environments requiring medium strength.

5. Difference from Similar Grades (C45 vs C40 vs C50)

Grade	Carbon Content	Key Advantage	Suitable Scenario
C45	0.42 – 0.50%	Balanced strength and toughness; good machinability	General mechanical parts (gears, shafts) with moderate wear demands
C40	0.37 – 0.44%	Higher ductility; easier to weld	Low-stress components (pipes, forgings) requiring formability
C50	0.47 – 0.55%	Superior hardness after heat treatment	High-wear applications (tools, dies) needing greater surface hardness

6. Selection & Usage Precautions

Heat Treatment Essential: Always apply quenching and tempering for high-strength applications to avoid brittleness; consult EN 10083 for specific cycles.
Machinability Optimization: Use sulfur-free variants for precision machining; coolant recommended to prevent tool wear due to medium carbon content.
Corrosion Limitations: Not suitable for harsh corrosive environments — apply protective coatings or select alloy steels if exposure to moisture or chemicals is expected.
Quality Verification: Obtain material certificates confirming compliance with EN 10083-2; perform non-destructive testing (e.g., ultrasonic) for critical parts.

7. Get a Carbon Steel Quote

If you need customized C45 carbon steel products (bars, plates, forgings) or want to get a detailed price quote, please contact our team directly. Our specialists will provide professional technical support and competitive pricing based on your requirements.

C22 carbon steel Non-Alloy Quality Steels (EN 10083 series)

baoliironsteel.com — Tue, 30 Sep 2025 12:48:31 +0000

C22 Carbon Steel: Non-Alloy Quality Steels (EN 10083 Series)

C22 carbon steel (EN 1.0501), part of the non-alloy quality steels in the EN 10083 series, is a medium-carbon, non-alloyed structural steel known for its good strength, toughness, and machinability. With a carbon content of 0.17-0.24%, it offers a balanced combination of hardness and ductility after heat treatment, making it ideal for quenched and tempered components in mechanical engineering, automotive, and general machinery applications. This article covers its chemical composition, mechanical properties, manufacturing processes, typical uses, comparisons with similar grades, and selection guidelines.

Related product

1. Core Chemical Composition (EN 10083-2 Standard)

Element	Content Range	Function
Carbon (C)	0.17 – 0.24%	Provides hardenability and strength; medium level ensures good wear resistance without excessive brittleness
Silicon (Si)	≤ 0.40%	Acts as a deoxidizer; improves elasticity and high-temperature strength
Manganese (Mn)	0.40 – 0.70%	Enhances tensile strength and toughness; aids in deoxidation and sulfur neutralization
Phosphorus (P)	≤ 0.045%	Controlled impurity; higher levels can cause brittleness
Sulfur (S)	≤ 0.045%	Restricted to improve ductility; low content prevents hot shortness
Chromium (Cr)	≤ 0.40%	Residual element; slight enhancement of hardenability if present
Others (e.g., Cu, Ni)	≤ 0.30% each	Residuals; controlled to avoid adverse effects on weldability

2. Key Mechanical Properties (Normalized Condition)

Tensile Strength (Rm): 540 – 700 MPa (EN 10083-2 standard; varies with heat treatment)
Yield Strength (ReH): ≥ 355 MPa (for diameters ≤ 100 mm; supports moderate load-bearing)
Elongation (A5): ≥ 18% (adequate ductility for forming and machining)
Hardness (HB): 170 – 210 (as-rolled; up to 220 after normalization)
Impact Toughness (KV): ≥ 27 J at 20°C (maintains integrity in impact loading)

3. Manufacturing Process Characteristics

Smelting: Basic oxygen furnace (BOF) or electric arc furnace (EAF) with ladle refining to achieve low impurity levels and precise carbon control.
Hot Rolling: Rolled at 850-1100°C into bars, billets, or plates; finished with controlled cooling to refine grain structure and avoid cracking.
Heat Treatment: Normalization at 850-900°C followed by air cooling to relieve internal stresses; quenching and tempering (quench at 820-860°C in oil/water, temper at 500-650°C) for enhanced strength.
Cold Drawing: For precision bars (≤ 50 mm), multi-pass drawing with annealing to achieve tight tolerances and improved surface finish.
Surface Treatment: Pickling in acid solutions to remove scale; optional phosphating or coating for corrosion protection during storage.

4. Typical Application Fields

Mechanical Engineering

Shafts, gears, pins, and axles in machinery — benefits from good machinability and response to heat treatment for wear-resistant parts.

Automotive Industry

Crankshafts, connecting rods, and suspension components — provides balanced strength and cost for high-volume production.

General Machinery

Bolts, fasteners, and structural elements in agricultural and construction equipment — suitable for moderate stress environments.

Tooling & Components

Base materials for simple tools, fixtures, and jigs — easy to machine and heat treat for custom fabrication.

5. Difference from Similar Grades (C22 vs C45 vs C60)

Grade	Carbon Content	Key Advantage	Suitable Scenario
C22 (1.0501)	0.17-0.24%	Good balance of strength and ductility; excellent machinability	Medium-duty components requiring moderate hardness
C45 (1.0503)	0.42-0.50%	Higher strength and wear resistance after quenching	Heavy-load gears and shafts in demanding applications
C60 (1.0601)	0.57-0.65%	Superior hardenability for high surface hardness	Wear parts like cams and dies in high-wear environments

6. Selection & Usage Precautions

Heat Treatment Essential: Always normalize or quench-and-temper as per EN 10083-2 to achieve desired properties; improper treatment leads to cracking or reduced toughness.
Machining Guidelines: Use carbide tools at moderate speeds; coolant recommended to prevent built-up edge; pre-hardening not required for most operations.
Weldability Limits: Preheat to 150-200°C for thicknesses >20 mm; use low-hydrogen electrodes (e.g., E7018); post-weld stress relief to avoid distortion.
Corrosion Consideration: Susceptible to rust in moist environments — apply protective coatings (e.g., zinc plating) or paints for outdoor use.
Quality Verification: Obtain material certificates confirming compliance with EN 10083-2; check for ultrasonic testing on bars to ensure internal soundness.

7. Get a Carbon Steel Quote

If you need customized C22 carbon steel products (bars, plates, coils) or want to get a detailed price quote, please contact our team directly. Our specialists will provide professional technical support and competitive pricing based on your requirements.

C10 carbon steel Non-Alloy Quality Steels (EN 10083 series)

baoliironsteel.com — Tue, 30 Sep 2025 12:48:24 +0000

C10 Carbon Steel: Non-Alloy Quality Steels (EN 10083 Series)

C10 carbon steel, designated as 1.1121 under the EN 10083 series for non-alloy quality steels, is a low-carbon, unalloyed steel grade optimized for quenching and tempering. With its controlled carbon content (0.07-0.14%), it offers excellent machinability, moderate strength, and good weldability, making it ideal for manufacturing mechanical components, fasteners, and structural parts. This article explores its chemical composition, mechanical properties, processing techniques, applications, and comparisons with related grades.

Related product

1. Core Chemical Composition (EN 10083-2 Standard)

Element	Content Range	Function
Carbon (C)	0.07 – 0.14%	Provides basic strength and hardenability; low level ensures good ductility and formability
Silicon (Si)	≤ 0.40%	Acts as a deoxidizer; enhances elasticity and resistance to scaling at elevated temperatures
Manganese (Mn)	≤ 0.40%	Improves hot workability and tensile strength; stabilizes the microstructure
Phosphorus (P)	≤ 0.045%	Controlled impurity; higher levels can embrittle the steel and reduce weldability
Sulfur (S)	≤ 0.045%	Improves machinability in free-cutting variants; strictly limited in standard grades to prevent brittleness
Chromium (Cr)	≤ 0.40%	Trace residual; minor contribution to hardenability without alloying effects

2. Key Mechanical Properties (Quenched and Tempered Condition)

Tensile Strength (Rm): 450 – 600 MPa (depending on diameter and heat treatment)
Yield Strength (Re): ≥ 280 MPa (adequate for moderate load-bearing applications)
Elongation (A): ≥ 18% (good ductility for cold forming and bending operations)
Hardness (HB): 121 – 163 (annealed state; increases to 200-250 HB after quenching and tempering)
Impact Toughness (KV): ≥ 27 J at 20°C (maintains integrity under dynamic loading)

3. Manufacturing Process Characteristics

Smelting: Basic oxygen furnace (BOF) or electric arc furnace (EAF) with ladle refining to achieve low impurity levels and uniform composition.
Hot Rolling: Performed at 850-1100°C to produce bars, billets, or sections; controlled cooling to refine grain structure and avoid excessive scale formation.
Cold Drawing: For precision bars, multi-pass drawing with intermediate annealing at 650-700°C to achieve dimensional accuracy and surface finish.
Heat Treatment: Quenching in oil or water from 830-880°C, followed by tempering at 550-650°C to balance hardness and toughness while minimizing distortion.
Surface Treatment: Pickling in hydrochloric acid to remove mill scale; optional shot blasting or phosphating for enhanced corrosion protection during storage.

4. Typical Application Fields

Automotive Components

Shafts, pins, gears, and fasteners in low-to-medium stress assemblies — valued for cost-effective machinability and consistent performance.

Machinery and Tools

Bolts, nuts, studs, and transmission parts for industrial equipment — suitable for environments requiring moderate strength and wear resistance.

Construction and Fabrication

Reinforcement bars, brackets, and structural fittings — easy to weld and form for on-site assembly in building projects.

Agricultural Equipment

Plough shares, harrow tines, and machinery frames — provides reliable durability in outdoor, variable-load conditions.

5. Difference from Similar Grades (C10 vs C15 vs C45)

Grade	Carbon Content	Key Advantage	Suitable Scenario
EN C10	0.07-0.14%	Superior machinability and weldability; low cost	Light-duty components (pins, shafts) with minimal heat treatment needs
EN C15	0.12-0.18%	Better hardenability for case-hardening applications	Gears and wearing parts requiring surface hardness
EN C45	0.42-0.50%	Higher strength and wear resistance after quenching	Heavy-duty axles, crankshafts, and tools in demanding service

6. Selection & Usage Precautions

Corrosion Considerations: Prone to rust in moist or corrosive environments — apply protective coatings (e.g., zinc plating) or paints for extended outdoor use.
Heat Treatment Control: Avoid overheating during quenching to prevent cracking; temper immediately after to reduce brittleness and internal stresses.
Machining Practices: Use high-speed tools with coolant; sulfur-free variants for better weldability, but may require adjusted feeds for optimal chip control.
Quality Verification: Obtain material certificates per EN 10204 to verify compliance with EN 10083-2 standards for composition and properties.

7. Get a Carbon Steel Quote

If you need customized C10 carbon steel products (bars, rods, sections) or want to get a detailed price quote, please contact our team directly. Our specialists will provide professional technical support and competitive pricing based on your requirements.