Specification for high expansion heat-resisting steel billets, bars, forgings and parts (Ni 25.5, Cr 15, Ti 2, Mn 1.5, Mo 1.25, Si 0.7, V 0.3) (Solution treated at 980 °C)

Specification for high expansion heat-resisting steel billets, bars, forgings and parts (Ni 25.5, Cr 15, Ti 2, Mn 1.5, Mo 1.25, Si 0.7, V 0.3) (Solution treated at 980 °C)

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1   Scope

This British Standard specifies requirements for nickel-chromium-titanium-manganese-molybdenum-silicon-vanadium heat-resisting steel supplied in the following forms, and as parts.
  1. a) Bars for machining: solution treated and precipitation treated, designation HR 51A.
  2. b) Billets and bars for forging: hot or cold worked and subsequently machined or ground, designation HR 51B.
  3. c) Forgings: solution treated and precipitation treated, designation HR 51C.