... cement machinery parts with the material of carbon or low alloy steel. Product Name: Marine rudder/shaft/ sternpost system, such ... , sternpost, chain wheel, slag pot, etc.Material:Carbon steel,Low alloy steel: ZG20SiMn, ZG35SiMn, ZG35SiMnMo, ZG35CrMo, ZG42CrMo, ZG40Cr, ZG34CrNiMo, ZG40Mn , ... on.More than 20 years experience, we now have one set of 8 tons of electirc arc furnace(maximum casting 28T ...