SM490A - Q/ASB 271-2025

Grade	SM490A
Corresponding Standard	Q/ASB 271-2025 Hot-Rolled Steel Plates and Strips for Structural Use
Classification	Carbon Steel

SM490A Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr ^①	Ni ^①	Cu ^①	N ^①
Minimum Value	-	-	-	-	-	-	-	-	-
Maximum Value	0.2	0.55	1.65	0.035	0.035	0.3	0.3	0.3	0.008

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

SM490A Mechanical Properties

Thickness mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
≤5	490~610	ReL ≥325	A50mm, L0=50mm, b=25mm ≥22
＞5~16	490~610	ReL ≥325	A200mm, L0=200mm, b=40mm ≥17
＞16	490~610	ReL ≥315	A200mm, L0=200mm, b=40mm ≥22

SM490A 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"!