... with the material of carbon or low alloy steel. Product Name: Marine rudder/shaft/ sternpost system, such as rudder blade, ... , sternpost, chain wheel, slag pot, etc.Material:Carbon steel,Low alloy steel: ZG20SiMn, ZG35SiMn, ZG35SiMnMo, ZG35CrMo, ZG42CrMo, ZG40Cr, ZG34CrNiMo, ZG40Mn ... Province. Its main products include rudder blade, quill shaft,anvil stand,support roller,cast steel joints for bridge, ...