A579 Grade 51 - ASTM A 579-2004(R2014)

Grade	A579 Grade 51
Corresponding Standard	ASTM A 579-2004(R2014) Standard Specification for Superstrength Alloy Steel Forgings
Classification	Martensitic Stainless Steel

A579 Grade 51 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	Al	Sn
Minimum Value	-	-	-	-	-	11.5	-	-	-	-	-
Maximum Value	0.15	1	1	0.025	0.025	13.5	0.75	0.5	0.5	0.05	0.05

A579 Grade 51 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	≥1210	≥965	≥12	≥45		≥20
Forgings；Section size ≤ 50mm		≥965			Annealing ≤197

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