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Bundy Tube Double Walled Steel Tube

    • Typical Clients: GM
    • Market Type:OE Market 
    • FOB Price: USD 3000
    • Payment Terms: L/C, D/A, T/T, M/T, D/D, CASH, D/P, Western Union
    • Minimum Order: 1Ton/Tons

Quick Details

  • Material:

    Metal

  • Size:

    4.76mm

  • Other Sizes:

    6mm - 15mm

  • Application:

    Hydraulic brake

  • Surface coating:

    Copper or Zinc or PVF or Galfan

  • Main Raw Material:

    Low Carbon Steel

Product Name:Bundy Tube Double Walled Steel Tube

Bundy Tube Double Walled Steel Tube

Product Description:

  • Dimensions and Tolerances
  • Manufacture Standard
  • Material and Mechanical Performance
  • Inspection Tests
  • Corrossion Protection
  • Delivery Condition

Ian Industrial Supply offers double wall welded steel tubes, also known as Bundy Tube, Copper Brazed Double Wall Steel Tube, or Copperized Double Wall Steel Tube.

Double wall copper brazed steel tube is an economic alternative of copper and copper nickel tubes used widely in automotive and AC&R applications, offering satisfying rigidity against high pressure, flexibility for bending and flaring, and rather good heat conduct ability.

Dimensions and Tolerances

We supply double wall copper brazed steel tubes of many sizes with fine accuracies.

Dimensions
OD Wall Thickness
mm in. 0.7mm 1.0mm
4      
4.76 3/16    
6      
6.35 1/4    
8 5/16    
9.52 3/8    
10      
12      
12.7 1/2    
15      
Tolerances (mm)
OD Tolerance Wall Thickness Tolerance
<4.76 ±0.05 0.7 ±0.08
4.76~8 ±0.08 1 ±0.1
>8 ±0.15    

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Manufacture Standard

Our double wall copper coated steel tubes are made strictly per SAE J527/ASTM A254/DIN74234/GOST11249.

  • High Dimensional Accuracy
  • Satisfying Mechanical Properties
  • Stable Surface Coating
  • Clean Inside Surface

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Material and Mechanical Performance

These tubes are made from low carbon steel strip produced by China's biggest steel mill Baoshan Iron&Steel Co., ltd..

Material
BHG2 Baoshan Iron&Steel Co., Ltd.
Chemical Composition
Element C Si Mn P S Alt
Max 0.6 0.3 3 0.3 0.3 0.2
Mechanical Properties
Tensil Strength 42000psi (290MPa)
Yield Strength 26100psi (180MPa)
Elongation 25%
Expansion 20%
Inside SurfaceCleanliness 0.16g/m2

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Inspection Tests
  • Nondistructive Electronic Test
  • Expansion Test
  • Flattening Test
  • Bending Test
  • Flaring Test
  • Pressure Proof Test
  • Inside Cleanliness Test

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Corrossion Protection

The basic tubing is coated with copper both inside and outside. However, it protects the tubes from corrossion better with zinc plate or PVF coating.

Click to learn how we protect tubes from corrossion.

  • Zinc plated chromated to Silver
  • Zinc plated chromated to Yellow
  • Zinc plated chromated to Dark Green
  • PVF coated
Delivery Condition

Tubes can be delivered in roll/coil with radius of 300mm ~500mm, pancake, or bulk roll.

Roll Coil Pancake Bulk Roll
 

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Supplier Details

Ian Industrial Supply Limited

Market Type: After Market 
Business Type: Manufacturer
Main Product: Brake Line Tubing

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