1. Disc for butterfly valve 2. Precision Casting 3. Stainless Steel 4.OEM brand ... steel, refractory steel, bronze, cast iron, cast steel, stainless steel, Hastelloy alloy, Stellite alloy, Mondale alloy, and other alloy castings.2 ... machining, plating, heat treatment etc.4.Application: mining equipment, pump & valve, ship building industry, heavy machinery, engineering machinery, water treatment etc ...