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USA UNS N07252
Old Grade
Corresponding Standard ASTM B 637-2018
Standard Specification for Precipitation-Hardening and Cold Worked Nickel Alloy Bars, Forgings, and Forging Stock for Moderate or High Temperature Service
Classification Alloy Steel
Properties Corrosion Resistance
Chemical Element Composition Content (%)
Component Fe C Si Mn P S Cr Cu Mo Ti B Co Al More
Minimum Value - 0.1 - - - - 18 - 9 2.25 0.003 9 0.75 Ni:余量
Maximum Value 5 0.2 0.5 0.5 0.015 0.015 20 0.1 10.5 2.75 0.01 11 1.25
Mechanical Properties
heat treatment Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Reduction of Area
ψ
% 		Hardness
HBW
solution + precipitation hardening psi
≥160000		 psi
≥90000		 ≥20 ≥18 ≥310

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