20Cr2Ni4A Alloy Steel Round Bar Precision Diameter Sizes
20Cr2Ni4A Alloy Steel Round Bar Precision Diameter Sizes
Feature
-
This product features high-strength 20Cr2Ni4A alloy steel, known for its excellent toughness and through-hardening properties. It is ideal for heavy-duty components such as gears and shafts that endure high stress. Note that after carburizing, direct quenching should be avoided to minimize retained austenite on the surface, ensuring optimal heat treatment results. Available in diameters from φ2mm to φ500mm to meet various precision machining needs.
1). Material: 20Cr2Ni4A High-Quality Alloy Steel
2). Size: Diameter φ2mm - φ500mm (Custom sizes available upon request)
3). Surface Treatment: Black, Bright, Polished, or as per customer's requirement
4). Packing: Standard sea-worthy packing (bundled with steel strips, wrapped in waterproof paper, or as per customer's requirement)
Starting from the initial small-scale experiments, to the current full-size range of round steel products covering from φ2mm to φ500mm, the application scenarios of 20Cr2Ni4A have been continuously expanding. The small-sized ones (φ2 - φ50) are mostly used in precision gears, fuel pump plungers, etc.; the medium and large-sized ones (φ50 - φ500) are widely applied in the drive axle gears of heavy-duty vehicles, the transmission shafts of large-scale construction machinery, and the wear-resistant components of mining equipment. Its excellent quenching and tempering properties ensure that the core parts of large-sized components can also achieve good strengthening effects.
1.High hardenability: The higher nickel-chromium content endows the material with excellent hardenability, and the core of large-section parts can also achieve a good strengthening effect.
2. High-strength and high-toughness matching: Combining high strength and high toughness, suitable for impact loads in complex working conditions.
3. Process Key Points: After carburizing treatment, direct quenching is not advisable. Instead, re-heating quenching or deep cold treatment should be adopted to reduce the residual austenite on the surface, ensuring dimensional stability and contact fatigue life.
4. Specification range: We can supply full-size cold-drawn round steel ranging from φ2mm to φ500mm, meeting the requirements for precision processing.
20Cr2Ni4A, as a high-quality Alloy Steel Round Bar, boasts high strength, excellent toughness, and outstanding hardenability. It is widely used in various heavy-load, impact, and precision transmission scenarios. With a wide specification range of φ2 - φ500, it can not only meet the processing requirements of micro-precision parts but also fulfill the load-bearing requirements of large structural components.
I. Heavy Machinery Transmission System
Application components: Heavy-duty gears, gearboxes' gears, drive axle gears, spline shafts, transmission cross shafts
Scene description: In mining machinery, construction machinery and heavy trucks, the transmission components need to withstand extremely high torque and impact loads. After carburizing, the surface layer of 20Cr2Ni4A obtains high hardness, while the core maintains high toughness, which can effectively resist tooth surface wear and tooth root fracture, significantly extending the service life of the equipment.
II. Aviation and Military Equipment
Application components: Aircraft engine shaft parts, landing gear components, weapon structural parts
Scene description: This material complies with the GB/T 3078-2008 standard for high-quality alloy steel and possesses excellent fatigue resistance. It is suitable for the aerospace and specialized equipment fields where the reliability of the materials is of utmost importance.
III. Precision Molds and Tooling Jigs
Application components: Cold heading die, precision mold frame, high-strength fixture, locating pin
Scene description: Small-sized (φ2 - φ50) 20Cr2Ni4A round steel is commonly used to manufacture high-hardness and high-maintainability mold parts and tooling fixtures. Its excellent thermal treatment dimensional stability ensures the repeatability positioning accuracy in precision processing.
IV. Oil and Mining Operations
Application components: Drilling connector, wear-resistant sleeve, crusher main shaft
Scene description: In harsh open-pit mining and oil drilling environments, equipment must withstand abrasive wear from sand and heavy compression. The high hardenability of 20Cr2Ni4A ensures uniform mechanical properties in the core of large-sized parts (with a diameter of 100mm or larger), meeting the requirements of extreme conditions.
V. Rail Transit and Shipbuilding
Application components: locomotive traction gears, bogie pin shafts, rudder rod connectors
Scene description: The components of rail transit and ships are constantly exposed to alternating loads and vibrations. The combination of the material's strength and toughness, along with the compressive stress state of the surface layer after carburizing, can effectively delay the initiation of fatigue cracks and ensure operational safety.
Application
As China metal materials industry leading enterprises, the national steel trade and logistics "Hundred good faith enterprise",China steel trade enterprises, "Top 100 private enterprises in Shanghai”. Shanghai Zhanzhi industry Group Co., Ltd.,(shorted to Zhanzhi Group) takes the" Integrity, Practicality, Innovation, Win-Win " as its sole operation principle, always persist in putting the customer demand in the first place.
- INTEGRITY
- WIN-WIN
- PRAGMATIC
- INNOVATION
