Dongying Haihe Machinery Co., Ltd has been a professional manufacturer of investment castings since 1988. Now it has expand to more than 260 staff, including 5 senior engineers and over 10 senior technicians. In haihe , there are two process -------sodium silicate investment casting and silicasol investment casting. Most of the products are stainless steel castings, carbon steel castings, alloy steel castings as well as the aluminium and bronze castings. The product include flanges, valve parts, pump parts, marine hardware, construction hardware, auto and motor parts and other parts for ***** Haihe can do ï¼? Surface treatment: sand blasting shot blasting, polishing, painting plating, zinc plating, Nickle plating and so on. Heat treatment: anneal , tempering, quenching, hardening and tempering, solid solution treatment Additionally, we have the complete and advanced CNC machining center and inspection center.