Product Description

1)material: *8CrMoAlA(JIS SACM**5) 2)technics: Heat-treatment nitriding treatment spray coating alloying screw and barrel for rubber machine *****: 1)Heat-treatment 2)nitriding treatment 3)spray coating alloying 4)hard-chrome electroplated ***** parameter: 1)diameter:*0mm***0mm 2)maxiumn screw length:****0mm 3)barrel inner bore diameter :**0mm 4)depth of nitration case:0.**0.7mm 5)hardness of nitration:HV*******0 6)roughness of the surface:Ra0.4 7)screw straigtness:0.**5mm