英国标准

BS 4449:1988 圆钢/螺纹钢

BS 4449:2005 螺纹钢

Tensile Properties

The absolute maximum permissible value of yield strength is 650MPa
For yield strength (Re), the upper yield (ReH) shall apply. Determine (Re) from the 0.2% proof strength (Rp0.2) if a yield phenomenon is not present.

Chemical Composition (Maximum% by Mass)

Ceq = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15