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ASTM

A747/A747M-18

Standard Specification for Steel Castings, Stainless, Precipitation Hardening

2018

4

ASTM Vol.01.02 (2023)

This specification covers iron-chromium-nickel-copper corrosion-resistant steel castings, capable of being strengthened by precipitation hardening heat treatment.

These castings may be used in services requiring corrosion resistance and high strengths at temperatures up to 600 °F [315 °C]. They may be machined in the solution heat-treated condition and subsequently precipitation hardened to the desired high-strength mechanical properties specified in Table S24.1 with little danger of cracking or distortion.

The material is not intended for use in the solution heat-treated condition.

NOTE 1: If the service environment in which the material is to be used is considered conducive to stress-corrosion cracking, precipitation hardening should be performed at a temperature that will minimize the susceptibility of the material to this type of attack.