Product information:

Standard specifications:

22/45,35/75,40/80,45/90,45/97,45/100,50/105,51/105,55/110,55/120,58/125,60/125,65/120,

65/132,70/143,70/150,70/158,80/143,80/156,80/172,90/188,92/188,95/190,105/191,100/200

Note:

1.Compression ratio of screw: design according to different products and mixtures.

2. Customized all kinds of screw and barrel based on customer’s drawings.

Technical Data:

Surface roughness: Ra0.4 μm   
Linearity of screw: 0.015mm/m

Depth of nitrided layer: 0.50~0.80mm
Nitrided hardness: 950~1100HV

Nitrided brittleness:less than grade one

Nitriding time: 160 hours above

Hard chrome plating of hardness after nitriding: ≥950HV

Depth of chrome plating layer: 0.03~0.10mm
Depth of bimetallic layer:≥3mm
Bimetallic hardness:HRC55-72

Function: based on vacuum heat treatment,high frequency quenching, nitriding treatment,hard chrome electroplating and bimetallic alloy spray welding.insure all screw barrels keep hardness from surface till core with torque resistance,high hard-wearing,strong flowability and work under high temperature with resistant high density adhesion and resist high corrosion.