BS 2HR 650:2011
螺栓,螺柱,固定螺絲及螺母加工用高膨脹耐熱鋼棒線材規范(Ni 25.5,Cr 15,Ti 2,Mn 1.5,Mo 1.25,Si 0.7,V 0.3)(限定等圓斷面50 mm)
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)