Patent ID: 8152938

Claim:
Mechanical component or structural element component, characterized in that it is produced in accordance with a method for producing a component from steel, characterized in that the method comprises the following steps prior to the finishing of the component which provides the component with its definitive shape: preparing a steel characterized in that the composition thereof is, in percentages by weight: C=0.18-0.30% Co=5-7% Cr=2-5% Al=1-2% Mo+W/2=1-4% V=trace levels—0.3% Nb=trace levels—0.1% B=trace levels—50 ppm Ni=10.5-15% with Ni≧7+3.5 Al Si=trace levels—0.4% Mn=trace levels—0.4% Ca=trace levels—500 ppm Rare earth elements=trace levels—500 ppm Ti=levels—500 ppm O=trace levels—200 ppm if the steel is obtained by means of powder metallurgy, or trace levels—50 ppm if the steel is obtained by means of production in air or under vacuum from liquid metal N=trace levels—100 ppm S=trace levels—50 ppm Cu=trace levels—1% P=trace levels—200 ppm the remainder being iron and inevitable impurities resulting from the production operation; forging the steel; a softening tempering operation at 600-675° C. for from 4 to 20 hours followed by cooling in air; solution heat treating at 900-1000° C. for at least 1 hour, followed by cooling in oil or air which is sufficiently rapid to prevent the precipitation of intergranular carbides in the austenite matrix; and hardening ageing at 475-600° C. for from 5-20 h, wherein Rm at ambient temperature is between 2200 and 2350 MPa.