Is SS400 same as A36?

JIS G3101 SS400 is one of the most common carbon structural steel grade, other grades of JIS G3101 are ss330, ss490, ss540. Related product type includes steel plate, steel sheet, steel sections, steel pipes, etc.

Is SS400 mild steel or carbon steel?

SS400 is a type of carbon steel. It is commonly used for structural purposes and has a relatively low carbon content, making it milder in comparison to some other types of carbon steel.

Is SS400 same as A36?

Steel grades ASTM A36 and SS400 under JIS G3101 both are common used carbon structure steels,mild steels.When rolling steel plates ASTM Grade A36,As rolled or Controlled rolled is ok for thickness belows 40mm (1.5inch) normally.If above 40mm (1.5inch),customers can choose Normalized for improve steel property.Stee plates SS400 is also the same.

Carbon steel grades SS400 vs A36		Chemical composition: Heat Analysis  Max%
Standard	Grade	C	Mn	P	S	Si	Cu
ASTM A36/A36M	A36	0.25	/	0.040	0.050	0.40	/
JIS G3101	SS400	/	/	0.050	0.050	/	/
Mechanical Properties:		Thickness		Yield strength		Tensile strength
				Mpa  Min.		Mpa
ASTM A36/A36M	A36	T≤200		250		400-550
JIS G3101	SS400	T≤16		245		400-510

SS400 and A36 these two mild steel grades are very similar,can replacement when urgent demands for end users.ASTM A36 steel plate and SS400 steel plate under JIS G3101 both are common used carbon structure steels,mild steels.