Changzhou Joyruns Steel Tube CO.,LTD
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EN10305-1 DC04 Brazed Single Wall copper-coated Bundy tube 6*0.65mm
Changzhou Joyruns steel tube Co., Ltd offers premium quality Single-wall Zinc Coated Bundy Tube Which is Used In Wire On Tube Condenser for B2B importers and distributors worldwide. Changzhou Joyruns steel tube Co., Ltd is located in China and deals exclusively in the production and export of Steel Pipes.
The low carbon steel brake tube is supplied in single wall and double wall(Bundy Pipe). The products conform to ASTM A-254-91, A-512-91A and ASTM A214 and A513 in material and quality. Common sizes we supply to the client include 4.76mm×0.7 mm,6.35 mm×0.7 mm and 8 mm×0.7 mm.
Single-Wall Steel Tubing with the same coating range as double-wall tubing but with the addition of a nickel-coated internal diameter to withstand the corrosive environment created by modern-day fuels.
Single & Double Wall Steel Tubing Bundy tubes that can be combined with an extensive range of corrosion- and abrasion-prevention coatings such as NyAl (aluminum and polyamide coating), NyZinc (zinc and polyamide coating), NyGal (Galfan and polyamide coating), PVF and many others. These tubes can also be provided with a polypropylene jacket to provide outstanding abrasion resistance.
Brazed Double Wall Tubing
Double-wall tubing is produced by roll forming copper-coated carbon steel strips into a double wrapped tubular shape as shown in the cross-sectional diagram. The formed tube is passed through a controlled atmosphere brazing furnace where it is fused together to produce a sealed tube. Double-wall tubing is ideally suited for use in applications that are subject to high levels of vibration and fatigue, such as household and commercial refrigeration compressors.
Chemical Composition
| Chemical Composition | ||||
| C | Si | Mn | P | S |
| ≤0.08% | ≤0.03% | ≤0.03% | ≤0.02% | ≤0.02% |
Mechanical Properties
| Tensile Strength | ≥290Mpa |
| Yield Strength | ≥180Mpa |
| Elongation | ≥ 20 % |
| Salt spray test | 48hours |
| Inside Surface Cleanliness | ≤ 20 g/m2 |
The tolerance allowed for the OD of the steel tube:
| OD | The tolerance allowed (based on no coating) |
| < 4.76 | ±0.05mm |
| 4.76 ~ 8.00 | ±0.08mm |
| > 8.00 ~ 12.00 | ±0.10mm |
The tolerance allowed for the thickness of the steel tube:
| Thickness | The tolerance allowed (based on no coating) |
| 0.50 | ±0.07mm |
| 0.70 | ±0.08mm |
| 1.00 | ±0.09mm |
