... Pipe Fittings 1.material:malleable cast iron 2.weight:0.5-2kgs ... making, casting, heat treatment, surface finish, and machining.6Production euipmentproduction line of investment casting introduced ... 3) The resin sand casting of ductile iron and gray iron;4) Non-ferrous casting with investment ... steel and carbon steel casting; 50 tons non-ferrous casting, and 2,000 tons of gray iron and ductile iron ...