Product Overview & Engineering Expertise
Global Supply Image: Engineered by Yushen Hydraulic - Over 15 years of manufacturing excellence, exporting premium alloy steel precision tubes to 30+ countries worldwide, serving top-tier automotive and hydraulic brands.
Our Alloy Steel Precision Tubes are manufactured utilizing state-of-the-art cold drawing and cold rolling processes, delivering exceptional dimensional accuracy, high tensile strength, and pristine surface finishes. Designed to withstand high pressure, extreme temperatures, and corrosive environments, our products are widely trusted by tier-1 automotive components OEMs and heavy hydraulic machinery manufacturers globally.
Manufacturing Standards: Strict adherence to DIN 2391, EN 10305-1, ASTM A519, and JIS G3445.
Key Advantage: Produced via oxygen-free bright anaerobic heat treatment, ensuring zero oxide layers on both internal and external walls.
Surface Quality: Internal surface roughness reaches up to Ra <= 0.4 um, minimizing friction and fluid resistance in high-speed hydraulic systems.
Technical Specifications & Capabilities
Our flexible production capabilities allow us to meet both standard commercial requirements and tight custom tolerances.
|
Feature / Parameter |
Specifications & Technical Capabilities |
|
Outer Diameter (OD) |
4mm - 120mm (Customizable upon request) |
|
Wall Thickness (WT) |
0.5mm - 15mm |
|
Precision Tolerance |
Standard: +/- 0.05mm | High-Precision Custom: up to +/- 0.03mm |
|
Steel Grade (International Equivalent) |
EN 10305-1 / DIN 2391: E235 (St37.4), E355 (St52, St52.4), St35, St45 ASTM A519: 4130, 4140, 1010, 1020, 1045, 8620 JIS G3445: STKM 11A, STKM 12B, STKM 13C GB/T 3639: 20Cr, 40Cr, 15CrMo, 35CrMo, 42CrMo, 16Mn |
|
Delivery Condition (Heat Treatment) |
+C (BK): Cold drawn, no heat treatment. +LC (BKW): Light cold drawn. +SR (BKS): Stress relieved. +A (GBK): Annealed. +N (NBK): Normalized (Bright anaerobic heat treatment). |
|
Straightness |
Max 0.5mm / 1000mm (Enhanced straightness available for CNC machining) |
Why Global B2B Buyers Choose Yushen Hydraulic
100% Non-Destructive Testing (NDT): Every single precision tube undergoes automated Eddy Current Testing or Ultrasonic Testing before packaging to eliminate any risk of micro-cracks or sand holes.
Cost-Efficient Machining: Our ultra-tight dimensional tolerance ensures seamless integration into your automated CNC turning and machining processes, drastically reducing material waste and tool wear.
Strict Cleanliness Control: Excellent internal wall cleanliness prevents hydraulic system contamination, ensuring long-term reliability for your fluid power applications.
Proven Track Record: Our alloy tubes are approved and utilized in heavy-duty engineering machinery, critical automotive steering systems, and high-pressure fluid power sectors across Europe, the Americas, and Southeast Asia.
Typical Applications
Our high-precision alloy steel tubes are vital components engineered for high-load and critical safety industries:
Hydraulic & Pneumatic Systems: High-pressure hydraulic fluid lines, cylinder tubes, and automotive fuel injection systems.
Automotive Industry: Steering columns, shock absorbers, drive shafts, and high-strength chassis components.
Precision Machinery: Spindles, bearings, bushings, and customized CNC machined parts.
Energy & Marine Engineering: High-pressure boilers, heat exchangers, and offshore drilling equipment.
Quality Assurance, Testing, & Certification
•Uncompromised Reliability: Quality is the lifeline of Yushen Hydraulic. We offer complete transparency from raw material tracking to final dispatch.
•Certifications: Fully certified to ISO 9001:2015 quality standards.
•Traceability (EN 10204 3.1 MTC): Every single shipment is accompanied by a genuine Mill Test Certificate (MTC) detailing the exact Heat Number, chemical composition analysis, and mechanical testing data.
Our In-House Lab Testing Procedures:
•Chemical Analysis: Direct-reading spectrometer verification.
•Mechanical Property Testing: Tensile strength, yield strength, elongation, and Rockwell/Vickers hardness.
•Technological Testing: Flaring, flattening, and bending tests to ensure workability.
•Surface Roughness Measurement: Controlled testing to ensure Ra limits are strictly met.
Seaworthy Packaging & Global Logistics
Ensuring your products arrive pristine, rust-free, and ready for immediate production.
Double Anti-Rust Protection: Tubes are thoroughly coated with premium anti-rust oil internally and externally to endure long ocean transits.
End Preservation: Heavy-duty plastic caps are fitted on both ends to prevent dust, debris, and mechanical damage during handling.
Secure Bundling: Hexagonal bundles strapped with heavy plastic wrapping. For LCL (Less than Container Load) shipments, we offer solid, IPPC-certified wooden crates.
Traceable Labeling: Each bundle features clear, weatherproof labels detailing Grade, Size, Heat Number, and Weight for effortless warehouse management on your end.
Customization & OEM/ODM Services
We cater to niche engineering specifications that standard suppliers cannot match:
Custom Chemistry: Tailored chemical compositions to match specific hardening or welding requirements.
Value-Added Processing: Fixed-length precision cutting, end chamfering, deburring, and specific external coatings.
FAQ
Q: What is your Minimum Order Quantity (MOQ)?
A: For standard sizes and grades available in stock, our MOQ is flexible. For customized production runs, the MOQ typically ranges from 1 to 5 tons, depending on the specific dimensions and steel grades required. Please contact our sales team for a custom solution.
Q: Can you provide third-party inspections?
A: Yes, absolutely. We welcome and can coordinate third-party inspections by globally recognized agencies such as SGS, TUV, BV, or Lloyds based on your project requirements.
Q: Do you provide free samples for quality verification?
A: Yes, we can provide free samples of standard sizes from our stock for your technical assessment. The buyer only covers the international courier/express cost.
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