ASTM A36 SS400 steel are basically the same. ASTM A36 steel falls under the standard of the American Society for Testing and Materials ASTM A36/ A36M. The SS400 steel falls under the standard of Japanese Industrial Standard JIS G3101.
Both ASTM A36 SS400 steel are structural hot rolled steel in the form of plates, sheets & strips for general structural applications. The ASTM standard A36 steel and the JIS standard SS400 steel chemical composition are also much the same.
ASTM A36 SS400 steel Chemical composition %:
| Grade | C (t≤16mm) | Si | Mn | P | S | Cu |
| ASTM A36 | 0.26 max | 0.40 max | - | 0.040 max | 0.050 max | 0.20 min |
| SS400 | - | - | - | 0.050 max | 0.050 max | - |
ASTM A36 SS400 steel properties:
| Grade | Yield strength ReH/(N/mm2) (t≤16mm) min | Tensile strength Rm/(N/mm2) (3mm≤t≤16mm) | Elongation A/%(3mm≤t≤40mm) min |
| ASTM A36 | 250 | 400-550 | 23 |
| SS400 | 245 | 400-500 | 21 |
JIS SS400 steel is ASTM A36 equivalent material. Both ASTM A36 SS400 steel are designed for structural purposes. In common application cases, ASTM A36 SS400 mechanical property can achieve the same purpose. If you have special steel requirements, you need to look up at the chemical composition and mechanical property table to make sure whether ASTM A36 steel or JIS SS400 steel more suitable.
Other steel grades usually used to compare with ASTM A36 and SS400 are S235JR, ST37-2, Q235B, A283C, SM400A, FE360B, E24-2, etc., welcome to contact for more information.
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