Question

 Spheroidal or nodular graphite iron is designed as SG 500/7. Here ‘500’ and 7 stand for                                 

(a) Proof stress in  N/ mm²  and elongation in %

(b) Tensile strength in N/ mm²  and impact strength in N–m

(c) Tensile strength in N/ mm²  and elongation in % 

(d)Tensile strength in kg/mm² and elongation in %