... can provide different kinds of investment castings per your drawings and samples. investment casting partFeatures:1) Process: a) Silica ... resistant steel: HH, HK, HE, HI, HF c) Carbon steel and alloy steel: ASTM 415-205, 80-40, LCA, CB, LCC, ... ensures chemical composition stable b) Just-read spectrum apparatus: improves and ensures physical performances (tensile strength, impact strength, elongation) 4 ...