Classification by steel grade

Stainless steel grades— ASTM standard

• ASTM 317L Stainless Steel
  ASTM 317L Stainless Steel: High-Molybdenum Austenitic Grade for Enhanced Corrosion Resistance in Harsh Environments ASTM 317L (UNS S31703) is a low-carbon, high-molybdenum austenitic stainless steel designed for superior corrosion resistance in aggressive chemical and high-chloride environments. With 3-4% molybdenum content—significantly higher than 316L—it excels in resisting pitting, crevice corrosion, and stress corrosion cracking (SCC) while… Read more: ASTM 317L Stainless Steel
• ASTM 316Ti Stainless Steel
  ASTM 316Ti Stainless Steel: Titanium-Stabilized Austenitic Grade for Enhanced Corrosion Resistance in Harsh Environments ASTM 316Ti (UNS S31635) is a titanium-stabilized variant of the 316 stainless steel family, engineered to overcome intergranular corrosion in welded structures while maintaining superior resistance to pitting and crevice corrosion in chloride-rich environments. By adding titanium (5×C min), this grade… Read more: ASTM 316Ti Stainless Steel
• ASTM 416 Stainless Steel
  ASTM 416 Stainless Steel: Free-Machining Martensitic Grade for High-Precision Components ASTM 416 stainless steel (UNS S41600) is a martensitic, free-machining grade optimized for automatic screw machines and CNC machining operations. With sulfur or selenium additions enhancing machinability up to 85% compared to standard austenitic grades, it is the preferred choice for mass-produced precision parts in… Read more: ASTM 416 Stainless Steel
• ASTM 420 Stainless Steel
  ASTM 420 Stainless Steel: Martensitic Stainless Steel for Cutlery, Surgical Instruments & Wear-Resistant Applications ASTM 420 stainless steel (UNS S42000) is a martensitic stainless steel grade renowned for its hardness, wear resistance, and moderate corrosion resistance. With a minimum chromium content of 12-14% and carbon content of 0.15% or higher, it achieves exceptional hardness through… Read more: ASTM 420 Stainless Steel
• ASTM 440C Stainless Steel
  ASTM 440C Stainless Steel: High-Carbon Martensitic Grade for Extreme Wear Resistance & Hardness ASTM 440C stainless steel (UNS S44004) is a high-carbon martensitic alloy renowned for its exceptional hardness, wear resistance, and moderate corrosion resistance. With a carbon content of 0.95-1.20%, it achieves the highest hardness among standard stainless steels (up to 60 HRC) after… Read more: ASTM 440C Stainless Steel
• ASTM 2205 Stainless Steel
  ASTM 2205 Stainless Steel: Duplex Stainless Steel for High-Strength & Corrosion-Resistant Applications ASTM 2205 (UNS S32205/S31803) is a nitrogen-enhanced duplex stainless steel that combines the benefits of austenitic and ferritic microstructures in a 50:50 ratio. This grade delivers exceptional strength (twice that of 304/316), superior resistance to stress corrosion cracking (SCC), and excellent pitting/crevice corrosion… Read more: ASTM 2205 Stainless Steel
• ASTM 2507 Stainless Steel
  ASTM 2507 Stainless Steel: Super Duplex Stainless Steel for High-Performance Corrosion Resistance ASTM 2507 (UNS S32750) is a super duplex stainless steel renowned for its exceptional combination of high strength, superior corrosion resistance, and excellent pitting/crevice resistance. With a balanced 25% chromium, 7% nickel, and 4% molybdenum composition, this grade outperforms conventional austenitic and duplex… Read more: ASTM 2507 Stainless Steel
• ASTM 904L Stainless Steel
  ASTM 904L Stainless Steel: High-Alloy Austenitic Grade for Severe Corrosive Environments ASTM 904L (UNS N08904) is a super-austenitic stainless steel with a low carbon content and high molybdenum addition (4-5%), designed for exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking in aggressive chemical environments. Originally developed for sulfuric acid handling, this grade outperforms… Read more: ASTM 904L Stainless Steel

Stainless steel grades—DIN standard

Stainless steel grades—ISO standard