One of my friends whose company specialized in the nickel based alloy investment casting and machining, the max. weight of each part can be 50kgs, they can do the material grade involved in 17-4PH, Dual Phase Steel, Inco 625, Co60, Inco 718, Inco 657, Monel Alloy and so on. Any one who have interests in their products, please send E-mail to us.