... , carbon steelC20,ZG45,WCB,WCC, alloy steel etc4.Standard: ASTM,AISI,DIN,JIS,BS etc5. strict material inspection6.test material machine: spectrometre7. precision ... . Application: industrial parts , machinery parts, auto parts, valve parts, pump part, train, craft, door handle, construction, hardware, orthotics prosthetics part, implant parts and so on ...