A579 Grade 41 - ASTM A 579-2004(R2014)

Grade	A579 Grade 41
Corresponding Standard	ASTM A 579-2004(R2014) Standard Specification for Superstrength Alloy Steel Forgings
Classification	Alloy Steel

A579 Grade 41 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Mo	V
Minimum Value	0.38	0.8	0.2	-	-	4.75	1.2	0.4
Maximum Value	0.43	1	0.4	0.015	0.015	5.25	1.4	0.6

A579 Grade 41 Mechanical Properties

	Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW	Impact Energy Absorption KV2 J
Forgings	≥1790	≥1380	≥9	≥30		≥20
Forgings	≥1930	≥1550	≥8	≥25		By agreement
Forgings；Section size ≤ 150mm		≥1380			Annealing ≤235
Forgings；Section size ≤ 150mm		≥1550			Annealing ≤235

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