... Material: GGG40,GGG50 Process:sand casting ASTM,JIS,DIN,GOST,GB standard sand casting ductile iron 450-101.Material: grey ... ironGG15,GG20,GG25,GG30,ductile iron 400-18,450- ... 1) Machinery properties and Chemical components testing after raw casting(2)Hardness checking(3)Dimensions testing(4)Prevailing microstructure testing iron casting