... the material of carbon or low alloy steel. Product Name: Marine rudder/shaft/ sternpost system, such as rudder blade, quill shaft ... roller,cast steel joints for bridge,gear,integrated chassis,steel bracket,rudder pintle, sternpost, chain wheel, slag pot, etc.Material:Carbon ... .,Ltd. is the leading manufacturer of large-scale cement and marine sand casting products in the north of Jiangsu Province. Its ...