We can supply and design all kinds of Single Screw & Barrel For Plastic Extruder Machine according to your requirement. We use Japan numerical control and computer control processing device to process screw.
The single screw and barrel for extruder have the following

Specification:
1. The single screw and barrel material:
A. 38CrMoAlA
This kind of material is applicable to double alloy and common molding screw
B. 9Cr18MOV
C. 42CrMo

2. Technicals:
A. Heating treatment
B. Nitriding treatment
C. Spray bimetallic alloy coating

3. Technical parameter:
Depth of Nitration Layer: 0.5-0.8mm
Hardness of Nitration: 950-1020Hv
Fragility of Nitration: Less than grade 1
Surface Roughness: Ra 0.4 um
Streightness of Screw: 0.015mm
Surface Hardness of Nitrated Cr coating Layer: >=950Hv
The Thickness of Cr Coating Layer: HRC55-62
Hardness of Alloy Plating: 0.03-0.08mm
Depth of Alloys Layer: >2mm

If you have any question referring to our screw barrel, please don't hestiate to let me know. It is our pleasure to be on the service of you.