Precision Seamless Honed Tube DIN 2391 ST52: Engineered for Excellence in Hydraulic Systems
As a specialized manufacturer of high-performance hydraulic components, we present the Seamless Honed Tube DIN 2391 ST52, a product engineered to redefine reliability and precision in industrial applications. Crafted under the stringent German DIN 2391 standard, this seamless honed tube combines superior material properties with advanced manufacturing techniques to deliver unmatched performance in high-pressure environments. The Seamless Honed Tube DIN 2391 ST52 leverages the robustness of ST52-grade steel—a non-alloy structural steel with a minimum yield strength of 355 MPa and tensile strength ranging from 490 to 630 MPa . Through processes like cold drawing and precision honing, the tube achieves an internal surface finish as fine as Ra ≤0.4 μm , ensuring optimal fluid dynamics and seal compatibility. Its seamless construction eliminates weld seams, guaranteeing uniform stress distribution and resistance to leakage under extreme pressures .
The manufacturing of the Seamless Honed Tube DIN 2391 ST52 involves multiple stages, including cold drawing to enhance dimensional accuracy and honing to refine internal topography. Tubes are subjected to specialized heat treatments such as normalized (+N) or stress-relieved (+SR) states to optimize mechanical properties like fatigue resistance and structural homogeneity . With tolerances adhering to ISO H8/H9 standards and straightness maintained within 0.5/1000 mm , this product is available in diameters of 30–480 mm and lengths of 6–12 meters, catering to diverse industrial needs. The Seamless Honed Tube DIN 2391 ST52 is further protected with anti-rust coatings and end caps, ensuring pristine condition during shipping and storage .
Technical Advantages and Key Features
Exceptional Mechanical Strength: The ST52 material grade provides a yield strength of ≥355 MPa and tensile strength of 490–630 MPa , enabling the Seamless Honed Tube DIN 2391 ST52 to withstand high-pressure cycles (up to 300 bar) and dynamic loads without deformation. Cold drawing and heat treatments further enhance its fatigue resistance, making it ideal for heavy-duty applications .
Precision-Grade Surface Quality: The honing process imparts a cross-hatched internal surface (Ra 0.2–0.4 μm) , which reduces friction, minimizes wear on seals and pistons, and facilitates efficient lubricant retention. This results in smoother operation, reduced energy losses, and extended component lifespan .
Dimensional Accuracy and Adaptability: With tight tolerances (e.g., ID conformity to H8/H9) and exceptional straightness (≤0.5/1000 mm) , the Seamless Honed Tube DIN 2391 ST52 ensures seamless integration with piston assemblies and seals. Customization options include non-standard diameters, wall thicknesses (5–70 mm), and lengths, addressing unique application requirements .
Corrosion and Wear Resistance: While ST52 steel inherently offers good durability, supplementary treatments like anti-rust oiling or phosphating can be applied to the Seamless Honed Tube DIN 2391 ST52 for use in corrosive environments such as marine or mining operations .
Application Spectrum
The Seamless Honed Tube DIN 2391 ST52 is indispensable across industries where precision and reliability are critical:
Hydraulic Machinery: Serves as cylinder barrels in excavators, presses, and industrial automation systems, ensuring leak-free operation under high pressures .
Construction and Heavy Equipment: Withstands extreme dynamic loads in cranes, bulldozers, and mining machinery, leveraging its robust structural integrity .
Marine and Offshore Systems: Corrosion-resistant variants endure saltwater exposure, making them suitable for shipbuilding and offshore platforms .
Automotive and Manufacturing: Used in injection molding machines, robotics, and precision guides, where dimensional stability directly impacts productivity .
Renewable Energy: Employed in hydraulic actuators for wind turbines and solar tracking units, highlighting its adaptability to high-stakes environments .
Product Variations
Cold-Drawn Seamless Honed Tubes: Ideal for general hydraulic applications, these combine cold-working benefits with honed precision for enhanced strength and surface finish .
Heat-Treated ST52 Tubes: Available in normalized (+N) or stress-relieved (+SR) conditions, these variants offer tailored mechanical properties for high-stress environments .
Custom-Finished Tubes: Options include phosphating for corrosion resistance or chrome plating for wear-prone applications, ensuring compatibility with specific operational needs .
Metric and Imperial Sizes: The Seamless Honed Tube DIN 2391 ST52 can be manufactured to metric (e.g., DIN 2391) or imperial standards, facilitating global interoperability .
Frequently Asked Questions (FAQ)
Q1: What standards govern the Seamless Honed Tube DIN 2391 ST52?
Our tubes comply with DIN 2391-94, EN 10305, and ISO 9001 standards, which define requirements for dimensional tolerances, surface finish, and mechanical properties . Each tube undergoes rigorous inspection, including hydrostatic testing and surface analysis, to ensure compliance.
Q2: How does honing benefit hydraulic system performance?
Honing creates a micro-surface topography that reduces friction and wear on seals and pistons, leading to smoother operation, lower maintenance costs, and extended component lifespan . The cross-hatch pattern also enhances oil retention, critical for efficient fluid power transmission.
Q3: Can the Seamless Honed Tube DIN 2391 ST52 be customized?
Yes. We offer tailoring in dimensions, wall thickness, heat treatment, and surface protections (e.g., phosphating or anti-rust coatings) to meet unique operational needs .
Q4: What protective measures are taken during shipping?
Each Seamless Honed Tube DIN 2391 ST52 is coated with anti-rust oil, capped at both ends, and packaged securely to prevent damage during transit .
Q5: What information should clients provide when ordering?
Detail operating pressure, environmental conditions (e.g., temperature, corrosion risks), hydraulic fluid type, and dimensional requirements to ensure optimal product selection .
