A768 Grade 1 Class 2 - ASTM A768/A768M-2005(R2015)

Grade	A768 Grade 1 Class 2
Corresponding Standard	ASTM A768/A768M-2005(R2015) Standard Specification for Vacuum-Treated 12 % Chromium Alloy Steel Forgings for Turbine Rotors and Shafts
Classification	Alloy Steel

A768 Grade 1 Class 2 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Mo
Minimum Value	-	-	-	-	-	11.5	0.4	-
Maximum Value	0.15	0.35	1	0.018	0.015	13	0.75	0.5

A768 Grade 1 Class 2 Mechanical Properties

Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Impact Energy Absorption KV2 J
≥585	≥435	≥18	≥45	≥28

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