Grade A217 Grade C12
USA UNS J82090
Other Names
Corresponding Standard ASTM A217/A217M-2014
Standard Specification for Steel Castings, Martensitic Stainless and Alloy, for Pressure-Containing Parts, Suitable for High-Temperature Service
Classification Cast Steel
A217 Grade C12 Chemical Element Composition Content (%)
Component C Si Mn P ** S ** Cr Ni * Cu * Mo W * V Nb More
Minimum Value - - 0.35 - - 8 - - 0.9 - - - (Ni+Cu+W)≤1
Maximum Value 0.2 1 0.65 0.035 0.035 10 0.5 0.5 1.2 0.1 0.06 0.03
A217 Grade C12 Mechanical Properties
Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
Reduction of Area
ψ
%
620~795 ≥415 ≥18 ≥35
Approximate Comparison Table Cast Steel
China United States International Organization for Standardization
GB UNS ISO Numerical Grade
ZG16Cr9Mo J82090 GX15CrMo9-1 1.7376

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