• the depth of the nitrided layer: 0.5 ~ 0.8mm
• Nitriding hardness: 950 ~ 1020HV
• Nitriding brittleness: ≤ 1
• Surface roughness: Ra 0.4μm
• Screw Straightness: 0.015mm
• chrome nitride surface layer hardness: ≥ 950Hv
• Two-alloy hardness: HRC55 ° -62 °
• chrome thickness :0.03-0 .08 mm
• Two-alloy depth:> 2mm
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