This British Standard specifies requirements for nickel-chromiumtitanium
heat-resisting alloy supplied in the following forms, and as parts.
a) Bars and extruded sections for machining: annealed, designation HR 5A.
b) Extruded sections for subsequent forming: softened, designation HR 5B.
c) Billets and bars for forging: hot or cold worked and subsequently machined or ground, designation HR 5C.
d) Forgings: annealed, designation HR 5D.