1 Scope
This British Standard specifies requirements for nickel-chromium-cobalt-aluminium-molybdenum-titanium heat-resisting alloy supplied in the following forms, and as parts.
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a) Bars and extruded sections for machining: solution treated, designation HR 4A.
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b) Billets and bars for forging: hot or cold worked and subsequently machined or ground, designation HR 4B.
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c) Forgings: solution treated, designation HR 4C.