... per customers' drawings & samples. FEATURES TO DUCTILE IRON CASTINGS OF PULLEYS & SHEAVES. 1.Material & Standard:ductile iron(GGG40,GGG50,GGG60);JIS,DIN,BS,GB ... 10. Part Unit weight range: For grey iron casting: up to 5000kgs; For ductile iron casting:up to 3500kgs; 11.Representative product: ... ,housing,casing,cover,valve body,pump body,big ring gear,bolster,frame,rear frame,front frame,engine block.