BS 2HR 650. 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 20 mm)
Aerospace series. Steel FE-PM1504 (X1CrNiMoAlTi12-10-2). Vacuum induction melted and consumable electrode remelted. Softened. Forging stock. a or D ≤ 300 mm