Bimetallic Screw & Cylinder
•Product Specification and technical data

•inner Diameter: Ø20-Ø300

•effective length: 12000mm

•Hardness of quenching and tempering: HB240°～280°

•Hardness of nitration: HV850°～1000°

•Depth of Nitrated Layer: 0.45～0.7mm

•Fragility of nitration: ≤ Grade 2

•Surface roughness: Ra0.4

 •straightness: 0.015mm

•Hardness of Cr-coating Layer: HV≥900HV

•Nitrided layer thickness: 0.05～0.10mm

•Thickness of Cr-coated Layer: 0.8～2.0mm

•Hardness of bimetallic: HRC56°～65°(Ni-based alloy)

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• Material : quality alloy steel

•① 38CrMoALA(JIS SACM645)

•② 42CMo(JIS SCM440)

•③ 9Cr18MoV

•④ CW6Mo5Cr4V2

•Heat-treatment:

•Nitriding treatment

•Electroplated hard-chrome finish

•High-frequency quenching

•Spray coating Bimetallic-alloy

•vacuum quenching