High Precision DIN 2391 Seamless Tube for Automotive Applications

Product Name

High Precision DIN 2391 Seamless Tube for Automotive Applications

Model Series

GH-AT-DIN2391 Series

Product Overview

Gilan Hardware Private supplies high precision DIN 2391 cold drawn and cold rolled seamless steel tubes specifically engineered for automotive applications. Manufactured under strict German standard tolerances, these tubes deliver superior dimensional accuracy, excellent surface finish, and high mechanical stability. Our GH-AT-DIN2391 series is widely utilized in critical automotive components requiring tight tolerances and reliable fatigue resistance, ensuring optimal performance in dynamic driving conditions.

Key Technical Parameters

Standards

• DIN 2391, EN 10305-1, ISO 8535, ASTM A519

  
  

Materials

• St35 (E235), St45 (E255), St52 (E355)

  
  

• 10#, 20#, 45# Carbon Steel

  
  

• 16Mn, 25Mn, 40Cr, 42CrMo Alloy Steel

  
  

• SAE 1010, 1020, 1035, 1045

  
  

Dimensional Range

• Outer Diameter (OD): 6 mm – 120 mm

  
  

• Wall Thickness (WT): 0.5 mm – 15 mm

  
  

• Length: Up to 12 meters (fixed or random length customizable)

  
  

Dimensional Tolerance

• OD Tolerance: ±0.05 mm – ±0.15 mm (depending on size grade)

  
  

• ID Tolerance: H8 – H9 (achievable via honing/skiving)

  
  

• Straightness: ≤ 0.3 mm / 1000 mm

  
  

• Roundness: ≤ 0.05 mm

  
  

Surface Condition

• Bright annealed (NBK), Oiled, Black phosphated

  
  

• Surface Roughness: Ra ≤ 0.4 – 1.6 μm

  
  

Delivery Condition

• BK (+C), BKW (+LC), BKS (+SR), GBK (+A), NBK (+N)

  
  

Product Advantages

• Micron-Level Precision: Cold drawn/rolled process ensures tight OD/ID/wall thickness tolerances, reducing secondary machining costs.

  
  

• Excellent Surface Integrity: Oxide-free bright surface minimizes friction, improves coating adhesion, and extends component service life.

  
  

• High Fatigue & Impact Resistance: Optimized grain flow from cold working and optional heat treatment enhances durability under cyclic automotive loads.

  
  

• Full Customization: Supports custom cutting, chamfering, end finishing, heat treatment, and surface coating per OEM drawings.

  
  

Typical Automotive Applications

• Shock absorber cylinders and piston rods

  
  

• Steering column tubes and steering gear housings

  
  

• Transmission shafts and drive shafts

  
  

• Cardan shafts, axle tubes, and chassis sleeves

  
  

• Engine mount brackets and suspension bushings

  
  

• Hydraulic brake system tubing

  
  

Quality Assurance

• Certifications: IATF 16949, ISO 9001:2015, ISO 14001, ISO 45001

  
  

• Testing: 100% Eddy Current Testing, Ultrasonic Testing, Tensile Test, Hardness Test, Dimensional Inspection

  
  

• Traceability: Full raw material batch tracking and production record archive

  
  

• Annual Capacity: 50,000 Tons

  
  

Commercial Terms

• Service Type: OEM / ODM

  
  

• MOQ: 5 Tons (sample order negotiable)

  
  

• Lead Time: 15–20 days (samples), 30–45 days (bulk)

  
  

• Payment Terms: T/T, L/C

  
  

• Incoterms: EXW, FOB, CFR, CIF

  
  

• Packaging: Hexagonal bundles with woven strips, VCI anti-rust paper, wooden crates for export