... iron, grey iron grade: GG15-GG40, GGG40-GGG70 Cast steel: Stainless steel, Cast low alloy steel, Special steel casting Process: Sand casting, Coated sand casting ... , Lost foam casting, Water glass sand resin sand casting, investment casting, die casting ... , planting machine, machining center etc Tolerance: casting: 0.5mm, machining:0.05mm, finish ...