Patent ID: 7931758

Claim:
A thermal mechanical treatment method, comprising hot working a precipitation hardening martensitic stainless steel; wherein the stainless steel comprises, in percent by weight: 11.0% to 12.5% chromium; 1.0% to 2.5% molybdenum; 0.15% to 0.5% titanium; 0.7% to 1.5% aluminum; 0.5% to 2.5% copper; 9.0% to 11.0% nickel; up to 0.02% carbon; up to 2.0% tungsten; up to 0.001% boron; iron; and incidental impurities; quenching the stainless steel; and aging the stainless steel, wherein the stainless steel is not solution heat treated prior to aging the stainless steel.