Zhoushan Zhongyang Screw Manufacturing Co., Ltd. [China]

Detailed Product Description

The parallel twin-screw for many kinds of plastic extruder in many specifications.

Abrasion resistant and corrosion resistant

Material:High quality alloy steel

           1)38CrMoAlA

           2)42CrMo

           3)9Cr18MoV

Technics:1)Heat-treatment

              2)Nitriding treatment

              3)Hard-chrome electroplated

              4)Bimetallic-alloy coating spraying

Technical parameter

Nitriding depth:0.50-0.80mm

Nitriding hardness:900-1000HV

Nitriding brittleness:Less than grade 1

Surface roughness:Ra0.4

Linearity of the screw:0.015mm

Hardness of the chromium plating after nitriding:More than 950HV

Chrome plating thickness:0.025-0.085mm