A1021 Grade C Class 3 S41428 - ASTM A1021/A1021M-2020(R2025)

Grade	A1021 Grade C Class 3
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 3 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 3 Mechanical Properties

Heat Treatment or Condition	Hardness HBW
Annealed	HB: ≤311 HRC: ≤33

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