BS 2HR 650:2011

This standard BS 2HR 650:2011 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) is classified in these ICS categories:

• 49.025.10 Steels

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.

1. 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.

2. 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.

3. 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.

4. Bar and wire with a maximum diameter of 50 mm for forging: softened, cold worked, solution treated and machined or ground, designation HR 650D.