... 4Quick delivery,wide application High tensile steel shaftFeature1)Material:iron,steel.stainless steel,carbon steel,HSS,2)surface treatment:hear treament ... ,roughness tester,hardness tester.5)application:medical device,industrial machine,automobile manufacture,electric applicance.6)service:providing ... compression strength,anti-torsion capacibility.Product view Forging high tensile steel shaft,OEM parts