A1021 Grade C Class 2 S41428 - ASTM A1021/A1021M-2020(R2025) - H2ABC

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Grade	A1021 Grade C Class 2
USA UNS	S41428
Corresponding Standard	ASTM A1021/A1021M-2020(R2025) Standard Specification for Martensitic Stainless Steel Forgings and Forging Stock for High-Temperature Service
Classification	Martensitic Stainless Steel

A1021 Grade C Class 2 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	N	Ti	W	V	Al	Sn
Minimum Value	0.1	-	0.65	-	-	11.25	2.25	-	1.5	0.02	-	-	0.25	-	-
Maximum Value	0.17	0.35	1.05	0.02	0.015	12.75	3.25	0.5	2	0.045	0.05	0.1	0.4	0.025	0.05

A1021 Grade C Class 2 Mechanical Properties

Heat Treatment or Condition	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
Quenched & Tempered Classes	≥1105	≥825	≥16	≥50	HB: ≤375 HRC: ≤40	≥54

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