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Zhoushan Weida Machinery Co., Ltd.
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Payment Terms: | T/T,L/C |
Place of Origin: | Zhejiang, China (Mainland) |
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Item Grade | Material composition |
Standard grade | 38CrMoAlA + nitriding 96 hours |
Bimetallic grade | 38CrMoAlA + bimetallic alloy |
TC-A grade | Tungsten carbide 40% |
TC-B grade | Tungsten carbide 25% |
TC-C grade | Tungsten carbide 15% |
Steel Material | DIN 41CrA1Mo7 / AST M4140/ GB 38CrMoAlA, 9Cr18MoV |
Heat Treatment | Tempered and nitride, nitride depth: 0.5 – 0.7 mm |
Surface hardness: | HV900 – HV1, 000 |
Special treatment: | Carbide coating (screw flight) and bimetallic barrel |
Screw straight tolerance | 0.015 mm/m |
Surface roughness | Ra 0.4μm |