... ) Complex shelling process d) Soluble glass process 2) Materials: a) Stainless steel: i) 304, 316, 316L, 309, 310, 312, 347, 410, 420 ... , chrome plating, sandblasting, painting, PVC powder coating 6) Precision machining: CNC lathes, milling, drilling, planning, grinding machines and testing facilities Investment stainless steel Casting Part