... making process b) excellent quality and cheap stainless steel investment casting partfeatures:1) Process:a) Silica sol shelling ... Complex shelling processd) Soluble glass process2) Materials:a) Stainless steel:i) 304, 316, 316L, 309, 310, 312 ... powder coating 6) Precision machining: CNC lathes, milling, drilling, planning, grinding machines and testing facilities Stainless Steel Investment Casting Part