Dalian Zhengyang Precision Casting Co., Ltd. By applying the most advanced technique of investment casting (silica sol), it is manufacturing the precision castings in different materials including plain carbon steel (WCB, WCC, LCC, etc.), alloy steel (410, 420, etc.) and stainless steel (CF3, CF3M, CF8, CF8M, etc.), which is a manufacturer specialized in investment casting, enjoying annual output of castings reaching above 200 tons.