2B vs BA vs No.4: Stainless Steel Finishes with Real Ra Values — A practical, buyer‑focused guide that prioritizes real decisions: what spec to choose, how to balance cost and performance, and how to avoid rework during fabrication and installation.
Key Takeaways
- Match grade/finish to environment and hygiene requirements.
- Confirm tolerances up front (ASTM/EN/JIS) to avoid rework.
- Use cut‑to‑size and nesting to reduce waste and logistics cost.
- Ask for MTC and third‑party inspection where critical.
Specs and Standards
| Parameter | Typical Range | Notes |
|---|---|---|
| Thickness tolerance | ±0.02–0.10 mm | Per ASTM A480/EN 10051 |
| Surface finish | 2B/BA/No.4/HL | Ra per finish and process |
| Coating weight (GI) | G40–G185 | Per ASTM A653 |
Selection Guide
- Define environment (corrosion/temperature/hygiene) and mechanical needs.
- Pick grade/finish/process accordingly; confirm tolerances and test methods.
- Plan processing (slitting, shearing, polishing, drilling) and packaging.
- Document with MTC and consider third‑party inspection when critical.
Applications and Case Notes
From building panels to sanitary equipment and structural frames, we include examples and pitfalls observed across real projects to help you decide confidently.
FAQs
Q: What lead time can I expect?
A: Typically 7–15 days ex‑works for standard sizes; complex processing may extend.
Q: Can you provide cut‑to‑size?
A: Yes. We slit, shear, laser, drill and bevel per drawing.
Q: How do you control quality?
A: Incoming inspection, process control and final inspection with traceable heat numbers.
Related products: view details, view details
All values are typical; confirm with datasheet and purchase order before production.
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