A. For steel castings, the minimum tensile strength is 41 kg/mm2 and minimum yield stress is 20.5 kg/mm2
B. For high tensile steel, the minimum tensile strength is 58 kg/mm2
C. For mild steel the minimum tensile strength is 44 kg/mm2 and minimum elongation of 23% on a gauge length of 5.65A
D. All the above