How JIS G3101 SS400 properties differ A36 steel properties

How JIS G3101 SS400 properties differ A36 steel properties

Both JIS G3101 SS400 steel and A36 steel are common used mild steel for structures. When rolling JIS G3101 SS400 steel plates, both As rolled or Controlled rolled is ok for thickness belows 40mm normally. If SS400 steel plate is thicker than 40mm, clients can choose Normalized to improve JIS G3101 SS400 properties. The condition is just the same for A36 steel.

JIS G3101 SS400 properties

JIS G3101 SS400 Thk≤ 16 Thk > 16 ≤ 40 Thk > 40 ≤ 100 Thk > 100
SS400 Yield strength (≥Mpa) 245 235 215 205
SS400 Tensile strength (Mpa) 400-510

A36 steel properties:

Thickness (mm) A36 Yield strength Min. A36 Tensile strength A36 Elongation in Min.
Thk≤200 250 Mpa 400-550 Mpa 200mm 50mm
200<Thk 220 Mpa 400-550 Mpa 20% 23%

JIS G3101 SS400 properties and A36 steel properties are very close to each other. The two mild steel grades can replace each other when the end user has urgent demands at most times.