Description

Diameter: φ45-φ200 （according to customers demands)
L/D ratio:16-35
The compression ratio of screw can be designed according to different products and mixtures.
Technical Parameter:
Hardness After Hardening & Tempering:HB280-320
Nitrided hardness: 950-1100HV
Nitrided layer depth:0.50-0.80mm
Nitrided brittleness: ≤ level 2
Surface roughness: Ra 0.4μm