Quenched and tempered hardness：HB260-290
Nitriding hardness：HV800-1050
Depth of nitriding layer：0.4-0.7mm
Nitrided brittleness：More than one level
Surface roughness：Ra0.4
Screw straightness：0.015mm
technical parameter
The hardness of the chromium plating layer after nitriding：More than 900HV
Chromium plating thickness：0.05-0.10mm
Double alloy hardness：HRC56-65
Double alloy depth：0.8-2.0mm
Materials and processes
High quality 38CrMoAIA
High quality powder metallurgy material
Cold, hot sprayed hard metal process
Advanced nitriding process
Corrosion resistant and wear-resistant bimetallic spraying process
Parallel twin screw, double hole cylinder series
Specifications：
Φ50/2 (2 represents twin-screw)，Φ65/2，Φ80/2，Φ90/2，Φ105/2，Φ125/2，Φ130/2，
Φ150/2，Φ180/2，Φ200/2
