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.
The exceptional performance of 17-4PH Precipitation Hardening Honed Tubes stems primarily from its base material—17-4PH precipitation hardening stainless steel (also known as PH stainless steel). This material is a martensitic precipitation hardening stainless steel, and the "PH" in its name represents the core process of "precipitation hardening." Unlike traditional stainless steels that require cold working to strengthen, 17-4PH achieves its exceptional strength through a special heat treatment.
Excellent Strength and Hardness: The most notable feature of 17-4PH is its ability to achieve a combination of high strength, high hardness, and excellent toughness through a single low-temperature heat treatment (aging). Its yield strength reaches over 1100 MPa, significantly higher than that of ordinary austenitic or duplex stainless steels. This means that hydraulic cylinders manufactured with 17-4PH Precipitation Hardening Honed Tubes can withstand extremely high pressures and exhibit excellent deformation resistance, making them ideally suited for heavy-load and high-impact applications.
Excellent Corrosion Resistance: 17-4PH offers excellent corrosion resistance similar to 304 stainless steel, resisting corrosion from a variety of media, including air, seawater, and acids, ensuring long component life in harsh environments.
Easy Processing and Heat Treatment: 17-4PH is relatively soft in the solution-annealed state, making it easy to machine, bend, and weld. After all processing is complete, aging treatment is applied to achieve uniform and extremely high mechanical properties throughout the part, eliminating the risk of heat-treated deformation in complex parts.
Heat Treatment
The manufacturing process for 17-4PH precipitation-hardened, fine-ground tubing includes heat treatments, typically solution-hardening and precipitation-hardening. Solution-hardening increases the material’s plasticity, while precipitation-hardening significantly enhances its strength.
Fine Grinding: Fine grinding is a critical step in ensuring smooth internal and external surfaces. Fine-ground tubing reduces friction and improves fluid flow efficiency, making it suitable for use in hydraulic and pneumatic systems.
The unique combination of properties of 17-4PH Precipitation Hardening Honed Tubes makes it the ideal choice for numerous high-end and demanding applications.
Aerospace Industry: Used in aircraft landing gear actuators, flight control system hydraulic cylinders, and engine thrust reversers. These applications place extreme demands on component weight-to-strength ratio, reliability, and corrosion resistance.
High-End Hydraulic and Pneumatic Systems: Hydraulic cylinders subjected to extremely high working pressures in large equipment such as injection molding machines, metal die-casting machines, and heavy construction machinery must utilize 17-4PH Precipitation Hardening Honed Tubes to ensure safety and durability.
Energy and Chemical Equipment: Used in turbine control systems, valve actuators, and precision components operating in highly corrosive media, these applications require both high strength and excellent corrosion resistance.
Medical and food processing equipment: 17-4PH precipitation hardening tubes are also used in specialized machinery requiring high strength, high cleanliness, and resistance to chemical cleaning agents.
17-4PH precipitation hardened tubes, with their excellent mechanical properties, corrosion resistance, and good processability, have demonstrated broad application prospects across a wide range of industries. Through proper maintenance and management, their advantages can be fully utilized, ensuring efficient operation of hydraulic and pneumatic systems. With the advancement of technology, the technology of 17-4PH precipitation hardened tubes will continue to advance, providing strong support for technological innovation across various industries.
