Specification for nickel-iron-chromium-molybdenum-aluminium-titanium heat-resisting alloy billets, bars, forgings and parts (Ni/Co 43.5, Cr 16.5, Mo 3.3, Al 1.2, Ti 1.2, Fe remainder)

Specification for nickel-iron-chromium-molybdenum-aluminium-titanium heat-resisting alloy billets, bars, forgings and parts (Ni/Co 43.5, Cr 16.5, Mo 3.3, Al 1.2, Ti 1.2, Fe remainder)

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1   Scope

This British Standard specifies requirements for nickel-iron-chromium-molybdenum-aluminium-titanium heat-resisting alloy supplied in the following forms, and as parts.
  1. a) Bars and extruded sections for machining: solution treated, designation HR 55A.
  2. b) Extruded section for subsequent forming: softened, designation HR 55B.
  3. c) Billets and bars for forging: hot or cold worked and subsequently machined or ground, designation HR 55C.
  4. d) Forgings: solution treated and precipitation treated, designation HR 55D.