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Mandrel is one of the most important tools necessary for the production of large-diameter seamless steel pipes by modern technology. The product is in a harsh environment during the rolling process of seamless steel pipes. During the rolling process, it has to withstand large and complex tensile and compressive contact stresses and high-temperature cold and hot fatigue stresses in high-speed cycles, therefore, the product has strict requirements on the chemical composition, mechanical properties, non-metallic inclusions, grain size, microstructure, ultrasonic flaw detection, dimensional accuracy, roughness and so on.
Mandrel size: φ90mm ~ φ500mm, length <18.5 m; The connecting thread is echelon thread, and the standard API 5B is implemented.
Material: H13(4 Cr5MoSiV1), can also be produced according to user requirements H11(4 Cr5MoSiV), 28 CrNiMOV10, 40CrNiMo and other materials of the mandrel products.
Material: 34 CrNiM06, 42CrMOA, 40CrNiMo, chemical composition, mechanical properties, hardness and other user requirements.
The company can provide large-size hollow mandrels of H13 material, and can also provide mandrels of special materials according to customer requirements. By reducing the weight of the tool to reduce the load of the equipment, to achieve the purpose of saving rolling costs.
The company uses self-developed high-performance composite materials with unique surfacing technology for the equal/variable diameter repair of various rolling tools, which ensures the durability and reliability of the repaired tools, including mandrels, jacks, jacks, straightening rollers, V-shaped rollers for conveyor rollers, etc.
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Address: Tunjun, Wenchang South Road, Jiyuan City
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