1. High-Quality Raw Materials Our raw materials are primarily sourced from renowned steel mills such as Jiangsu BOS Hydraulic Technology Co., Ltd., Baosteel, Ansteel, and Changjiang Steel Pipe.
2. Advanced Production Equipment Our manufacturing facilities include cold drawing machines, honing machines, skiving and roller burnishing machines, straightening equipment,polishing machines, heat treatment furnaces, grinding machines, and more.
3. Rich production experience, strict quality control We implement a professional internal quality control system to conduct comprehensive inspections on all products.
In precision manufacturing and high-end equipment, material selection is crucial to product performance and lifespan. As a high-performance precision tubing, 8620 Alloy Steel Honed Tube, with its excellent mechanical properties, wear resistance, and fatigue resistance, has become a key material in many industrial applications. This tubing combines the superior foundation of 8620 alloy steel with the exceptional surface quality achieved through the precision honing process, meeting the demands of a variety of demanding operating conditions.
8620 Alloy Steel is a commonly used low-carbon structural alloy steel, typically classified according to the Society of Automotive Engineers (SAE) standard. Its chemical composition includes carbon (0.18-0.23%), silicon (0.15-0.35%), manganese (0.70-0.90%), chromium (0.40-0.60%), nickel (0.40-0.70%), and molybdenum (0.15-0.25%). This carefully balanced alloying composition gives 8620 alloy steel its outstanding comprehensive properties.
The most notable feature of 8620 alloy steel is its excellent hardenability, which allows it to harden well in most cross-sections. It also exhibits high yield strength and good flexural strength, making it suitable for applications subject to high loads and impact. Furthermore, this material exhibits excellent wear resistance under high loads and wear conditions, and offers good machinability, making it easy to machine and heat treat.
Through carburizing and hardening, 8620 alloy steel produces a hard, wear-resistant surface layer while maintaining a core strength of approximately 125,000 psi (862 N/mm²). This layer is characterized by uniform carburized depth, hardness, and wear resistance, with minimal deformation. This characteristic makes 8620 alloy steel honed tubes excellent in applications requiring a combination of surface hardness and core toughness.
Material Selection: High-quality 8620 alloy steel is the foundation for producing high-performance honed tubes. With its low carbon content and optimal ratios of nickel, chromium, and molybdenum, 8620 steel offers excellent machinability and mechanical properties.
Hot Rolling or Cold Drawing: The cold drawing process stretches the steel tube to the target dimensions, significantly improving its strength and surface finish. The hot rolling process is suitable for the production of large-diameter and thick-walled tubes, ensuring uniform wall thickness and meeting high strength requirements.
Precision Honing: Honing is the most critical process in the production of 8620 Alloy Steel Honed Tube. Advanced honing equipment is used to precisely machine the inner surface of the tube, removing minute roughness and achieving a smooth, uniform surface. This process directly impacts the efficiency and performance of hydraulic and pneumatic systems.
Heat Treatment: The tube undergoes heat treatment through quenching and tempering to enhance its hardness, toughness, and fatigue resistance, enabling it to withstand high pressures and complex loads.
Quality Inspection: Every 8620 Alloy Steel Honed Tube undergoes rigorous inspections before shipment, including dimensional measurement, surface roughness testing, and pressure testing to ensure compliance with industry standards.
8620 Alloy Steel Honed Tube combines the excellent properties of the base material with the surface quality achieved through precision machining, offering a variety of performance advantages:
Balance of High Strength and Toughness: 8620 Alloy Steel Honed Tube boasts high yield strength and good bending strength, enabling it to withstand high loads and shock loads. Its core toughness ensures secure performance under complex stress conditions.
Excellent Wear Resistance: Due to its alloy composition and possible carburizing treatment, 8620 Alloy Steel Honed Tube exhibits excellent wear resistance in high-load and high-abrasion environments, extending its service life.
Excellent Surface Quality: Through the honing process, the inner surface is smooth and dimensionally accurate. The surface roughness (Ra value) can be reduced to 0.2–0.4μm (electrolytic polishing) or ≤ 0.8μm (mechanical polishing), reducing fluid flow resistance and improving sealing performance.
Excellent Processability: 8620 Alloy Steel Honed Tube can be processed through cold working, hot working, and welding, and its excellent weldability facilitates subsequent processing and manufacturing.
Corrosion Resistance: Processes such as electrolytic polishing can eliminate surface mechanical stress through anodic dissolution, improving stress corrosion resistance by over 40%. The corrosion resistance in salt spray testing exceeds 1000 hours.
Hydraulic Systems: 8620 Alloy Steel Honed Tube is a core component of hydraulic cylinders. Its high strength and smooth inner wall ensure smooth flow of hydraulic oil under high pressure, thereby improving the efficiency and reliability of the hydraulic system. This tubing is widely used in construction machinery such as excavators, cranes, and bulldozers.
Pneumatic Equipment: In pneumatic systems, it provides a low-friction running surface for pistons, significantly extending equipment life. It is commonly used in factory automation equipment and industrial processing machinery.
Energy Industry: In wind turbines, nuclear power plants, and oil drilling equipment, 8620 Alloy Steel Honed Tube, due to its corrosion resistance and fatigue resistance, is a key tubing material for hydraulic control systems.
Marine Engineering: Due to its corrosion resistance, 8620 Alloy Steel Honed Tube is widely used in ship hydraulic systems and offshore platform machinery, where it can withstand corrosion from high-salinity and high-humidity environments.
Heavy Machinery: Its high strength and wear resistance make it an indispensable core component in mining, drilling, and metallurgical equipment, enabling it to withstand harsh operating conditions.
Aerospace: Its combination of lightweight and high strength makes it an ideal choice for aviation hydraulic systems, meeting the stringent requirements of high-pressure hydraulic cylinders.
The production of 8620 alloy steel honing tubes combines metallurgical processing and precision manufacturing technologies. Seamless steel tubes are first produced through cross-rolling or extrusion, followed by a series of heat treatments (such as annealing, normalizing, quenching, and tempering) to achieve the desired material properties.
Carburizing is a common heat treatment process for 8620 alloy steel, typically performed at 900°C/925°C, followed by oil quenching and tempering at 150°C/232°C to achieve a combination of high surface hardness and core toughness.
Cold working methods such as cold drawing and cold rolling can further improve the dimensional accuracy and finish of the steel tubes. The final honing process, using specialized equipment and process parameters, ensures that the inner surface of the steel tube achieves the required dimensional accuracy and surface finish, resulting in high-quality 8620 Alloy Steel Honed Tube.
With the continuous advancement of industrial technology, the application areas and performance of 8620 Alloy Steel Honed Tube are also expanding. The following are several future development trends:
New Material Research and Development: Improving the composition of 8620 alloy steel to further enhance its strength and corrosion resistance.
Smart Manufacturing Technology: Optimizing manufacturing processes through artificial intelligence and automation to improve production efficiency and product quality.
Green Manufacturing and Sustainable Development: Reducing energy consumption and carbon emissions during the manufacturing process, promoting the development of environmentally friendly industrial materials.
