Liaocheng Qianyi Metal Products Co., Ltd. is located in Wangzhuang Industrial Park, Economic and Technological Development Zone, Liaocheng City. The precision steel tubes produced by the company are widely used in various industries due to their comprehensive specifications, high precision, and broad application scenarios. Below is a real introduction to the company's precision steel tube products from multiple aspects:
1. Core Production Strength
- **Equipment and Production Capacity**: The company is equipped with multiple high-precision cold rolling tube machines and precision rolling production lines, and has also added a 3-roll precision rolling machine, with precision control within 0.03 microns. It also boasts comprehensive physical and chemical testing equipment. Annual production of cold-rolled precision seamless steel tubes reaches 10,000 tons, ensuring stable bulk supply.
- **Production Process**: Adhering to stringent production procedures, the billet is first inspected, skinned, and then re-inspected. Subsequent processes include heating, piercing, pickling and passivation, and polishing, culminating in cold rolling, degreasing, cutting, and final product inspection. Compared to standard seamless pipes, our process includes the critical step of pickling and cold rolling, ensuring product quality.
2. **Key Product Specifications**
- **Specs & Sizes**: Our product specifications are diverse and customizable, offering precision steel tubes with diameters φ6 - φ219mm and wall thicknesses of 1 - 38mm. Some series also cover seamless steel tube sizes from φ6 - 426mm × 15 - 80mm, with φ18～φ121×2～25mm being one of our core standard sizes.
- **Material Types**: Offers a variety of high-quality materials, including 10#, 20#, 35#, 45# carbon steel, 16Mn, 27SiMn, Q345B low-alloy steel, and 20Cr, 40Cr, GCr15, 42CrMo alloy structural steel, to meet different performance requirements in various scenarios.
- **Accuracy Standards**: Inner hole precision up to H7-H10 levels, surface roughness Ra≤0.63μm, straightness ≤0.3mm/m, with some products' inner and outer diameter tolerances controlled within 0.03-0.05mm. Overall, tolerances can be maintained at 2-8 microns, meeting high-precision machining requirements.
3. Product Series & Applications
- **Specialized Automotive and Motorcycle Parts Tubing**: Precision cold-rolled steel tubes for use in shock absorbers of cars and motorcycles, compatible with components such as car springs and jack bodies, meeting stringent requirements for stability and precision in the vehicle's shock absorption system.
- **Specialized Mechanical and Hydraulic Tubes**: Includes precision seamless steel tubes with precise inner diameters for hydraulic and pneumatic cylinders, precision steel tubes for machinery, and precision rolled bearing steel tubes, etc. Compatible with hydraulic machinery, injection molding machines, forging machinery, and other equipment. Known for their ability to withstand high pressure without leakage, they ensure the stable operation of hydraulic systems.
- **Special Application Pipes**: Includes precision steel pipes for motor housing, steel reinforcement sleeve, and can also produce precision shaped pipes such as triangular pipes, hexagonal pipes, and various other specifications, suitable for special scenarios like motor manufacturing and construction reinforcement connections.
4. Product Core Advantages and Compliance Standards
- **Performance Advantages**: The product boasts non-oxidized inner and outer walls, features high luster, cold bending without deformation, and no cracks when expanded or flattened. The surface is treated to prevent rust, making it a popular choice among mechanical processing users for cost and time savings.
- **Execution Standards**: Strictly adheres to multiple standards in production, including national standards such as GB/T3639, GB/T8713, and international standards like DIN2391-2, EN10305. Products are not only supplied to the domestic market but also exported to regions such as Europe, the Middle East, and Southeast Asia.
