Screws and Barrels for Rubber Machinery

1. Material: 38CrMoAlA(Nitriding steel), SKD11, SKD61, high quality alloy steel, etc. 2. Technology: Nitriding treatment, alloy coating spraying, heat-treatment applied 3. Application: Rubber. 4. Technical Index: 1)Depth of nitrided layer: 0.5-0.8mm 2)Hardness of nitration: 900-1020Hv 3)Frigility of nitration: Less than Grade 1 4)Surface roughness: Ra. 0.4um 5)Hardness of Cr-coating layer: >=950Hv 6)Thickness of Cr-coating layer: 0.03-0.08mm 7)Hardness of Bimetallic layer: HRC55-72 8)Depth of Bimetallic layer: >2mm 5. Guarantee: Commom Nitrided: 1-2years Bimetallic: Much long time.