... kinds of investment castings per your drawings and samples. investment casting partFeatures:1) Process: a) Silica sol shelling-making process b ... shelling process d) Soluble glass process 2) Materials: a) Stainless steel: i) 304, 316, 316L, 309, 310, 312, 347, 410, 420 ... , milling, drilling, planning, grinding machines and testing facilities Investment stainless steel Casting Part