A732 Grade 21 - ASTM A732/A732M-2020

Grade	A732 Grade 21
Corresponding Standard	ASTM A732/A732M-2020 Standard Specification for Castings, Investment, Carbon and Low-Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
Classification	Alloy Steel

A732 Grade 21 Chemical Element Composition Content (%)

Component	Fe	C	Si	Mn	P	S	Cr	Ni	Mo	B	More
Minimum Value	-	0.2	-	-	-	-	25	1.7	5	-	Co：remainder
Maximum Value	3	0.3	1	1	0.04	0.04	29	3.8	6	0.007	Co：remainder

A732 Grade 21 Mechanical Properties

Condition	Test Temperature	Tensile Strength σ_b Mpa	Elongation or Extension Rate δ %
as cast		≥360	≥10

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