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.I***ct toughness:>12 4.Diameter:DIA15MM-DIA150MM 5.Features: (1) Characteristics: a) High hardness and resistance b) Good even wear c) No breaking