... ruler etc. Production ProcedureDrawings→Mould developing→Raw casting→Sandblasting----Rough machining or finish machining→Surface treatment ... GS-52Lost wax castingJIS-SC410, SC450, SC480,SCC5Lost foam castNF-GE230, GE280, GE320, GE370Shell-core cast ... SCCrM3Resin-sand mouldingASTM-LCCLost wax castingUNS-J02505, J13048Lost foam castNF-G20M6, G35CrMo4Shell-core cast Electric –furnace smeltingPhotos ...