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.
-
a) Bars and extruded sections for machining: solution treated, designation HR 55A.
-
b) Extruded section for subsequent forming: softened, designation HR 55B.
-
c) Billets and bars for forging: hot or cold worked and subsequently machined or ground, designation HR 55C.
-
d) Forgings: solution treated and precipitation treated, designation HR 55D.