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