BS 3S 144:1995+A2:2015

This standard BS 3S 144:1995+A2:2015 Specification for chromium-nickel-copper-molybdenum corrosion resisting steel (precipitation hardening) billets, bars, forgings and parts (1130-1330 MPa) is classified in these ICS categories:

• 49.025.10 Steels

This British Standard specifies characteristics of a chromium-nickel-copper-molybdenum corrosion resisting steel supplied in the following forms and as parts, for general aerospace use:

1. forging stock and billets and bars for subsequent working: softened designation S144A;

2. forgings: solution treated and primary hardened designation S144C;

3. forgings: solution treated, primary hardened and precipitated, designation S144G;

4. black bars for machining: solution treated and primary hardened, designation S144B;

5. black bars for machining: solution treated, primary hardened and precipitated, designation S144F;

6. bright bars for machining: solution treated, primary hardened and subsequently machined or ground, designation S144D;

7. bright bars for machining: solution treated, primary hardened and precipitated, designation S144H;

8. drawn bars for machining: solution treated, primary hardened and subsequently cold drawn or cold treated and re-primary hardened, designation S144E.