Machinery Parts

1.Material of machinery parts:42CrMo4,(1.7225/1.7227) or 42CrMoS4 ,cold rolled and annealed; 2.Machining: Cold Forging Turning Special Frock(Tap Frock) Thread Rolled on(Rolled /Thread) Drilling Milling... 3.Surface Treatment(superficial treatment ): Part to be free of nicks,burrs,tool marks,or other defects Part must be cleaned using ATOTECH Electrocleaner Phosphated and Oiled(EN 12476 Fe/Mnph/r/5/T4,alternate Fe/Znph/r/5/T4) Technical conditions according to FU 250 Breaking Load>9300N/ Through hardened 34±3 HRC 4.Checking Tensile and Yield Strength Surface Roughness geometric tolerance Form and Position Tolerance hardness and thickness of coating neutral salt spray test (NSS) .