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High Efficiency Bimetallic Injection Molding Screw and Barrel. Bimetallic Alloy Technology: Casts 2-5mm wear-resistant alloy layer on inner wall for high durability. Custom Material Options: Available in 38CrMoAla, SKD61, D2, Gr12MOV and other specialized alloys. High Hardness Performance: Nitriding hardness HV850-1000 and dual alloy hardness HRC50-65. OEM/ODM Customization: Personalized design and branding services accepted for screws and barrels. ISO9001 Certified Quality: State-of-the-art factory with comprehensive inspection prior to delivery. Global R&D Leadership: 30+ years experience with 80+ patents and proprietary material formulas. Comprehensive After-Sales: 48-hour technical response, on-site support, and regional spare parts.