... Certification Center) regulates the CRCC certificate for railway and locomotive products)Manufacture standerd:As to the railway products ... able to cast for you for steel ,iron materials,and etc.•Material*Ductile iron, Grey cast iron, Carbon steel, Alloy steel, Special ... part,motor shell/motor body,bolt,railway plate,gray iron/ductile iron/malleable iron,gear pump,stove grate,tie rod,pillow block ...