JINAO develops high-performance seamless tubes specifically for automotive steering system, leveraging advanced materials technology to ensure steering safety. Designed to withstand demanding conditions including high-frequency torsion and dynamic loading, our multi-pass cold-forming process delivers three critical attributes: deformation resistance, dynamic balance precision, and zero-defect surface integrity. Through comprehensive defect control - combining 0n-line ECT & UT - we guarantee surfaces free from folds, scratches, or cracks, ensuring seamless integration with subsequent processing. Fully compliant with IATF 16949 standards, we implement full traceability from raw materials to finished products, providing reliable material solutions for steering system manufacturing.
Standard
Manufactured to international standards including EN, DIN, ASTM, ASME, JIS and GB for worldwide compliance.
Specifications
We currently offer precision seamless steel tubes in the following standard dimensions (OD × WT × L) but not limit to:
17.3x3.425mm | 19.8x4.025mm | 23x3.2mm | 26x3mm | 28x3.2mm | 28.3x3.65mm | 29.3x3.45mm | 32x4.45mm | 32x4.05mm | 33.6x3.2mm |
Standard size coverage: Outer Diameter (OD) 12-100mm; Wall Thickness (WT) 0.7-20mm
Materials include but are not limited to: 20# | 35# | 15CrMoH etc. carbon or alloy steel.
Key Characteristics
High Precision
With advanced cold forming process, our tubes offer high precision dimensional accuracy to ensure product consistency in the following processes.
Ultra-Strong Steering Tubes
Heat-treated alloy tubes deliver exceptional strength/rigidity, reliably withstanding high steering loads and torque for stable vehicle control.
Excellent Fatigue Resistance
With high quality materials and superior processes, Jinao products have good anti-fatigue performance, effectively reducing the risk of failure due to fatigue damage, and guaranteeing the safety and reliability of automobile driving.
Premium Materials
Utilizing performance carbon steels, alloy grades, or custom-engineered materials per customer specifications, our tubes maintain exceptional durability and structural stability in complicated automotive operating environments.
Advanced Manufacturing Process
We combine advanced hot rolling and cold drawing/cold rolling processes to manufacture every seamless steel tube with precision and care. During hot rolling, solid billets are pierced at high temperatures and pressure to form the initial seamless structure. This is followed by cold drawing and cold rolling at room temperature, which further enhances dimensional accuracy and surface quality. The unique combination of techniques makes our tubes feature smooth inner and outer surfaces, free from cracks, pits, or blemishes - ensuring performance that reaches the advanced level of industry.
Customization Service
We offer customization for different specifications and various shaped tubes to meet your application needs. Specifications: Outer Diameter: 12-100mm; Wall Thickness: 0.7-20mm
Why Choose
Why Choose JINAO
We strictly follow IATF 16949, VDA 6.3, and the Toyota Lean Production System to enhance our production and process control - ensuring consistent, high-quality products for our customers.
Full-Process Seamless Tube Manufacturing
Integrated capability from Raw to Finished.
Short Development Cycles
Rapid response to customer needs and reduced time-to-market.
Consistent Quality
Strict quality control ensures product reliability.