As an enterprise of production and exportion for professional manufacture of abrasive resistant forged steel grinding balls in China,yearly productive capacity of various kinds of steel ball of Jinan Sinai Casting and Forging co.,ltd is 50,000 tons,exported to over ten countries and regions including Korea,Japan,Malaysia,Austrilia,Canada,and South Africa,etc,well universally received by clients. Spcification: 1.Chemical composition: C(0.6-1.2) Cr (<1.0) Si(0.15-0.6) Mn(0.6-1.5) S(<0.04) P(<0.04) Cu(<0.1) Mo(<0.25) Ni(<0.1) 2.Hardness:55-65 3.Impact toughness:>12 4.Diameter:DIA15MM-DIA150MM 5.Features: (1) Characteristics: a) High hardness and resistance b) Good even wear c) No breaking (2) Applied fields: a) Mines b) Cement plants c) Power stations d) Chemical industry 6.Outer packing: Container bags, steel drums