... steel precision casting/investment casting 1.ISO 9001 2.Strict QC 3.Standard:ASTM,AISI,BS,DIN,JIS,NF 4.OEM service Technology:precision casting/investment casting ... ; investment casting; water glass; lost wax;Material:Carbon steel, alloy steel, stainless steelStandards:ASTM, AISI, BS, DIN ...