Model Number: CMA70
Brand Name: SAE 4621H
Key Specifications/Special Features:
Description:Special structural steelApplications:Highly stressed, case hardened dies for artificial resin, of low deformingPhysical properties (avarage values) at ambient temperatureModulus of elasticity [103x N/mm2]: 210
Density [g/cm3]: 7.80
Soft annealing:
Heat to 700-720oC, cool slowly
Normalization:
Temperature: 860-925oC
Hardening:
Harden from a temperature of 900-930oC followed by oil quenching
Tempering:
Tempering temperature: ask
Forging:
Hot forming temperature: 1050 to 850oC
C: 0.21
Si: 0.28
Mn: 0.75
Cr: 0.85
Mo: 0.20
Ni: 1.35