Basic parameters:
technical parameter:

Quenching and tempering hardness: HB260-290

Nitriding hardness: HV950-1050

Nitrided layer depth: 0.4-0.7mm

Nitriding brittleness: ≤ one level

Surface roughness: Ra0.4

Screw straightness: 0.015mm

Surface chrome plating hardness after nitriding: ≥900HV

Chrome plating thickness: 0.05-0.10mm

Double alloy hardness: HRC56-65

Double alloy depth: 0.8-2.0mm