precision machining parts tumble lever

1.Material of precision machiningparts-tumble lever: 1045, 1020, 1010, 1018, 1215 (free cutting steel), 40Mn, 1141, copper, aluminum alloy,and cast steel. 2.Processing and operation: sawing, quenching and tempering, numerical control machining, drilling, honing, grinding, machining center 3. heat treatment:normalizing. 4.surface finish:chemical plating. 5.checkout: Tensile and Yield Strength metallurgical analysis geometric tolerance Form and Position Tolerance hardness and thickness of coating neutral salt spray test (NSS).