we are professionla in supply steel casting parts for ball mill Product Name: Marine rudder/shaft/ sternpost system, such as rudder ... , ZG42CrMo, ZG40Cr, ZG34CrNiMo, ZG40Mn , ZG50Mn and so on.Process: Mold-making,Clamping,Pouring,Cooling,heat treatment,Removal,Trimming,drilling etc.Application ...