28SiMnB A76282 - GB /T 1222-2016

28SiMnB Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu ^*	B
Minimum Value	0.24	0.6	1.2	-	-	-	-	-	0.0008
Maximum Value	0.32	1	1.6	0.025	0.02	0.25	0.35	0.25	0.0035

28SiMnB Mechanical Properties

	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW
Quenching and Tempering	≥1275		≥5	≥25	-
Hot Rolled (WHR)	-	-	-	-	≤302

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