A890 Grade 7A J93379 CD3MWN 27Cr-7Ni-Mo-W-N - ASTM A890/A890M-2018

Performance Level	A890 Grade 7A
USA UNS	J93379
Other Names
Corresponding Standard	ASTM A890/A890M-2018 Standard Specification for Castings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex (Austenitic/Ferritic) for General Application
Classification	Cast Steel
Properties	Corrosion Resistance

A890 Grade 7A Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	N	W	B	More
Minimum Value	-	-	1	-	-	26	6	-	2	0.3	3	0.001	Cr+3.3(Mo+0.5W)+16N≥45；Ba:0.0002~0.01；Ce+La:0.005~0.03
Maximum Value	0.03	1	3	0.03	0.02	28	8	1	3.5	0.4	4	0.01	Cr+3.3(Mo+0.5W)+16N≥45；Ba:0.0002~0.01；Ce+La:0.005~0.03

A890 Grade 7A Mechanical Properties

Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
≥690	≥515	≥20

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