Steel Grade Equivalent Chart
Steel Grade Equivalent Chart (AISI / UNS / EN / DIN / JIS / GOST / GB)
Search by any standard code (e.g., 304, S30400, 1.4301, SUS304, Q235B, 42CrMo4). Click a row to copy a clean summary for emails, POs, or QA notes.
| AISI / UNS | EN (W.-Nr.) | DIN | JIS | GOST | GB |
|---|
Why Grade “Equivalents” Matter in Global Steel Purchasing
Global supply chains rarely use a single standard. A drawing may specify an AISI/ASTM grade, while a supplier quotes EN or JIS, and the shipment documents list GOST or GB. A practical equivalency chart helps purchasing teams compare offers, read overseas MTRs, and keep substitutions under control—especially when lead times are tight.
How to Use the Converter
- Search any code: AISI/UNS, EN (W.-Nr.), DIN symbol, JIS, GOST, or GB.
- Filter by category (stainless, structural, low alloy, tool steel).
- Click a row to copy a clean summary for your quotation email or purchase order.
- Verify the final match using the target standard + MTR + intended product form (sheet/coil/plate/pipe) and heat treatment.
Reading Equivalents Correctly (Best Practices)
- Start with chemistry: confirm the composition windows overlap for your intended product form.
- Check mechanical requirements: yield/UTS/impact can differ even with similar chemistry.
- Watch suffixes: L (low carbon), N, Ti/Nb stabilized, PH—these change performance and weldability.
- Country variants exist: GB/GOST/DIN/JIS often have regional or historical aliases.
- Final authority: the target specification and the mill MTR for the exact heat you are buying.
When Substitution Is Risky
Be cautious with cross-substitution for pressure equipment, cryogenic service, high-temperature components, hardened tool steels, sour service, or weldments with tight C/N/Nb/Ti controls. If your project is code-driven, always follow the governing standard and require certified test documentation.
Work With LYHSteel
LYH Steel supports stainless and carbon steel sourcing with export-ready processing and documentation support. If you need help confirming grade alignment across standards, share your target spec and end-use—our team will propose suitable options and provide MTR-backed supply.
- Stainless Steel Overview
- Stainless Steel Sheet & Plate
- Laser Cutting Service
- News & Market Updates
- Contact Us for a Quote
FAQ
Is 304 the same as 1.4301 and SUS304?
They are widely treated as equivalents for general-purpose austenitic stainless. Confirm “L” vs non-“L” and your welding/inspection requirements.
What proves equivalence in practice?
The mill MTR (chemistry + mechanical test results) and compliance with the target specification for the delivered product form.
Can I use this chart for certified design?
Use it for sourcing and communication. For certified design/inspection, follow the governing standard and require test documentation.
Related search terms: steel grade equivalent, AISI to EN converter, JIS to ASTM equivalent, GB to AISI grade, GOST steel grade equivalent, stainless steel grades.