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Technical parameter

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

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 duplex stainless steel

High quality powder metallurgy material

Cold, hot sprayed hard metal process

Advanced nitriding process

Corrosion resistant and wear-resistant bimetallic spraying process

Conical twin screw, double hole cylinder series

SJS 35, SJS 51, SJS 55, SJS 65, SJS 80, SJS 92, 

Screw diameter / screw number

35/80-2, 51/105-2, 55/113-2, 65/132-2, 80/156-2, 92/188-2

Screw steering: outward outward

Screw speed：

1-40,2-32,1-36,1-32,1-32,1-32

Effective length of screw：

810mm，1070,1200,1441,1800,2500mm