... kinds of investment castings per your drawings and samples. investment casting partFeatures:1) Process: a) Silica sol shelling-making ... , 316, 316L, 309, 310, 312, 347, 410, 420 ii) ASTM: CA15, CA40, CF8, CF8M, CF3M, CF16F, CH10, CH20 iii) ... , chrome plating, sandblasting, painting, PVC powder coating 6) Precision machining: CNC lathes, milling, drilling, planning, grinding machines and testing ...