英國標準
BS 4449:1988 圓鋼 / 螺紋鋼
BS 4449:2005 螺紋鋼
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
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