... investment castings per your drawings and samples. investment casting partFeatures:1) Process: a) Silica sol ... shelling-making process b) Lost wax process c) Complex shelling process d) Soluble glass process 2 ... ) Materials: a) Stainless steel: i) 304, 316, 316L, 309, 310, 312, 347 ... resistant steel: HH, HK, HE, HI, HF c) Carbon steel and alloy steel: ASTM 415-205, 80 ...