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Specification for high expansion heat-resisting steel bar and wire for the manufacture of bolts, studs, set screws and nuts (Ni 25.5, Cr 15, Ti 2, Mn 1.5, Mo 1.25, Si 0.7, V 0.3) (limiting ruling section 50 mm)
This British Standard specifies requirements for **high expansion heat-resisting steel bar and wire** in the following forms for the manufacture of bolts, studs, set screws and nuts.
Bar with a diameter over 25 mm up to and including 50 mm and wire with a maximum diameter of 50 mm for machining: softened, cold worked, solution treated and machined or ground, designation HR 650A.
Bar with a diameter over 25 mm up to and including 50 mm and wire with a maximum diameter of 50 mm for machining: softened, cold worked, solution treated, precipitation treated and machined or ground, designation HR 650B.
Bar with a diameter over 25 mm up to and including 50 mm and wire with a maximum diameter of 50 mm for forging: softened, cold worked and machined or ground, designation HR 650C.
Bar and wire with a maximum diameter of 50 mm for forging: softened, cold worked, solution treated and machined or ground, designation HR 650D.
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