A723 Grade 1 Class 4 - ASTM A723/A723M-2018(R2023)

Grade	A723 Grade 1 Class 4
Corresponding Standard	ASTM A723/A723M-2018(R2023) Standard Specification for Alloy Steel Forgings for High-Strength Pressure Component Application
Classification	Alloy Steel

A723 Grade 1 Class 4 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Mo	V
Minimum Value	-	-	-	-	-	0.8	1.5	0.2	-
Maximum Value	0.35	0.35	1	0.015	0.015	2	2.25	0.5	0.2

A723 Grade 1 Class 4 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
≥1205	≥1105	≥12	≥35	（4.5℃） ≥27

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