Technical Standard:

    Select good quality material 38CrMoAlA,  Quenching and Tempering hardness:   HB240-280

    Nitride hardness: HV≥850

    Nitride depth: 0.45～0.80mm

    Nitride brittleness: ≤second level

    Surface roughness: Ra0.4um

    Straightness: 0.015mm

    Chrome plating hardness: 0.03～0.10mm

    Bimetallic hardness: HRC56-65

    Chrome thickness: 0.03～0.10mm

    Bimetallic depth:1.2-3.0mm