... cases,etc 5.Sand casting parts OEM service parts/investment casting/sand casting/ CNC machining DescriptionCNC machining process with sand castingMaterial Cast ... iron,alloy,zinc,brass, copper,bronze,or aluminum all kinds of metal,etc. Finish nickel plating, zinc ... , etc Machining machining center, CNC, conventional machines, all current processing methods Surface treatments: shot blasting, hot-dipped ...