A768 Grade 3 Class 1 - ASTM A768/A768M-2005(R2015)

Grade	A768 Grade 3 Class 1
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 3 Class 1 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Mo	Nb
Minimum Value	0.1	0.15	0.25	-	-	11	-	-	0.15
Maximum Value	0.16	0.45	1	0.015	0.012	13	0.75	0.2	-

A768 Grade 3 Class 1 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
620~760	≥485	≥15	≥45	≥20

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