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Specification for high expansion heat-resisting steel billets, bars, forgings and parts (Ni 25.5, Cr 15, Ti 2, Mn 1.5, Mo 1.25, Si 0.7, V 0.3) (Solution treated at 980 °C)
This British Standard specifies requirements for nickel-chromium-titanium-manganese-molybdenum-silicon-vanadium heat-resisting steel supplied in the following forms, and as parts.
Bars for machining: solution treated and precipitation treated, designation HR 51A.
Billets and bars for forging: hot or cold worked and subsequently machined or ground, designation HR 51B.
Forgings: solution treated and precipitation treated, designation HR 51C.
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