SS400 - Q/ASB 271-2025

Grade	SS400
Corresponding Standard	Q/ASB 271-2025 Hot-Rolled Steel Plates and Strips for Structural Use
Classification	Carbon Steel

SS400 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr ^①	Ni ^①	Cu ^①	N ^①
Minimum Value	-	-	-	-	-	-	-	-	-
Maximum Value	0.2	0.35	1.4	0.035	0.035	0.3	0.3	0.3	0.008

① Residual elements.
* Other alloying elements may be added.

SS400 Mechanical Properties

Thickness mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
≤5	440~510	ReL ≥245	A50mm, L0=50mm, b=25mm ≥21
＞5~16	440~510	ReL ≥245	A200mm, L0=200mm, b=40mm ≥17
＞16	440~510	ReL ≥235	A200mm, L0=200mm, b=40mm ≥21

SS400 Corresponding Standards(Same grade name, different standards)

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!