1.application fields:industries of cement building material ,metallurgical selection in mine,grinding coal in power plant,chemical industry and machinery,etc
2.(SIZE):DIA 20-150mm
3.(HARDNESS):HRC 50-60
4.(CHEMICAL  ELEMENTS):
5.C:0.52-0.65   Si0.15-0.37
Mn:0.6-1.2    S:≤0.04   P:≤0.04    Cr:≤0.25