Material – ASTM A 732 Grade 31

Standard Specification for Castings, Investment, Carbon and Low Alloy Steel for General Application and Cobalt alloy for High Strength at Elevated Temperatures

Group - Non-Ferrous Nickel Alloys

Sub Group - ASTM A 732 Grade 31 Castings, Investment, Carbon and Low Alloy Steel for General Application and

Cobalt alloy for High Strength at Elevated Temperatures

Application - Intended for Valve, Pump, General Engineering, Automotive, Medical and other Industries

Grade Belongs to the Industry - Casting

Chemical Composition
CarbonC %0.450 - 0.550
SiliconSi %1.000 max.
ManganeseMn %1.000 max.
ChromiumCr %24.500 - 26.500
SulphurS %0.040 max.
TungstenW %7.000 - 8.000
PhosphorusP %0.040 max.
BoronB %0.005 - 0.015
IronFe %2.000 max.
NickelNi %9.500 - 11.500
CobaltCo %Balance
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Heat Treatment
As-Cast or Annealing or Age Hardning
Mechanical Properties
Tensile Strength in Mpa380 min.
Yield Strength in Mpa-
Elongation in %10 min.
Reduction of Area in %-
Hardness in BHN-
Impact in Joule-

Cross Reference Table

Material Standard Country Grade Belong to the Industry
A 567 Grade 2 ASTM USA Casting
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