Zhoushan First Plasticmachinery Co,.Ltd
Double alloy screw barrel 1. Product introduction 1) ordinary nitriding screw (SACM645) 2) tooth top welding double alloy 3) full coverage tungsten steel screw 4) All hard series NPT1, NPT2, NOT3 5) The ceramic film, diamond film surface 6) In-hole centrifugal casting alloy (sub-ABC three levels) 2. Alloy level ST-A grade: tungsten carbide 38% ST-B class: tungsten carbide 22% ST-C grade: tungsten carbide 10.5% 3. technical indicators Alloy hardness: HRC60 ° -70 ° Inside diameter: 14-200mm Effective length: ...

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