PVF coated bundy steel tube

The bundy steel tube has fine inside cleanness, high strength, nice elongation, good foundation for late process , anti leakage, anti high pressure explosion, excellent anti corrosion power after surface treatment. It is an ideal material for tubes of  automotive industry.
The tube can be provided in coils or cut to length,etc.
Thickness of PVF coating may reaches: 8μm,12μm,15μm,25μm
If any questions,please  contact sales@grandsteeltube.com

  • Description
  • Baosheng's Advantages
  • Specifications
  • Inquiry

PVF (Polyvinyl Fluoride) coated steel Bundy tube has been adopted for brake lines, transmission cooler lines and power steering hard tubes by auto make like Volkswagen, Mazda, Nissan, Kia, Hyundai, and many others.

PVF coating of Bundy tubes typically looks dark green and nearly black. It has very good corrosion resistance.

In the manufacture process, the tubes shall be firstly electro-plated with zinc , chromated to enhance the zinc plating performance, and then coated with a layer of PVF to finally isolate the metal from outside environment.

Item Requirement
Process Electroplated Zinc, Trivalent Chromate, PVF Coating
Zinc Thickness 8μm, 13μm, 25μm
PVF Thickness Average 20μm, 8μm min
Salt Spray Test White Rust: 240hr to 480 hrRed Rust: 3000hr to 6000 hr

Our workshop,located in Changzhou,covers an area of 13,000 square meters equipped with the state-of-art facilities to manufacture the double wall bundy steel tubes and single wall bundy steel tubes .

The monthly production capacity is 3,000,000 meters.

The materials are :SPCC,SPHC,SPCE,BHG1,BHG2,other materials can be achieved after discussion.

Mainly sizes are:4.76×0.70mm,6.35×0.70mm,8×0.70mm,9.53×0.70mm,10×0.70mm,12×0.70mm other size like:4.00×0.5mm,3.18×0.7mm,2.60×0.50mm is also produced according the requirements.other sizes can be achieved after discussion.

We have been delivering these tubes to Peru,France,Russia,South Korea for the automotive industry,since 2011.etc.If any questions,you are more than welcome to contact sales@grandsteeltube.com


1.  Production of  double wall/single bundy steel tubes since 2005.

2.  Working with customers from Europe,North America,South America;etc since 2006.

3.  Samples can be delivered within 10 days after confirmation

4.  40 days as the production period and delivery after order confirmation.

5.  200,000 meters of copper coated  steel tubes in stock.

6.  Sizes can be offered from OD:2.60mmxWT:0.5mm to OD:12.7mmxWT:1.24mm

7.  Third party inspection like:TUV,BV,SGS,etc accepted

8.  Professional team assists your special tube requirements.

9. Other related tubes can be offered :white/yellow/black/olive green galvanized bundy tubes;etc

If any questions,you are more than welcome to contact sales@grandsteeltube.com

OD Tolerance Wall Thickness Tolerance
<3/16"  (<4.76mm) ±0.0020" (±0.05mm)    0.03"    (0.7mm) ±0.0031" (±0.08mm)
3/16"~5/16" (4.76mm~8mm) ±0.0031" (±0.08mm)    0.039"     (1mm)  ±0.0039"    (0.1mm)
>5/16"  (>8mm) ±0.0059" (±0.15mm)

Chemical Composition
Element C Si Mn P S Alt
‰Max 0.6 0.3 3 0.3 0.3 0.2
Mechanical Properties
Tensile Strength 42000psi (290MPa)
Yield Strength 26100psi (180MPa)
Elongation ≥25%
Expansion ≥20%
Inside Surface Cleanliness ≤0.16g/m2

If any questions,you are more than welcome to contact sales@grandsteeltube.com

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