Product Attribute:
Material:Metal
Size:4.76mm
Other Sizes:6mm - 15mm
Application:Hydraulic brake
Surface coating:Copper or Zinc or PVF or Galfan
Typical Clients:
GM
Production Description:
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Dimensions and Tolerances
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Manufacture Standard
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Material and Mechanical Performance
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Inspection Tests
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Corrossion Protection
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Delivery Condition
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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.
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High Dimensional Accuracy
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Satisfying Mechanical Properties
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Stable Surface Coating
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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
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Nondistructive Electronic Test
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Expansion Test
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Flattening Test
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Bending Test
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Flaring Test
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Pressure Proof Test
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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.
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Zinc plated chromated to Silver
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Zinc plated chromated to Yellow
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Zinc plated chromated to Dark Green
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PVF coated
Delivery Condition
Tubes can be delivered in roll/coil with radius of 300mm ~500mm, pancake, or bulk roll.
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Roll |
Coil |
Pancake |
Bulk Roll |
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