4.76mm,6mm,8mm Copper Coating Inside Bundy Tube
Bundy tube,steel with white zinc plated,copper coating inside,available outside diameter 4.76mm,6mm,8mm..
4.76mm,6mm,8mm Copper Coating Inside Bundy Tube
Bundy tube:carbon steel material;White zinc plated;Copper coating inside;Available outside diameter 4.76mm,6mm,6.5mm,8mm,10mm.
Features：
- Cost Effective Price
- Reliable and Professional
- ASTM A254-97 Standard
- 100% inspect before shipping
- Various size available
- Available custom steel brake lines
- Free sample for checking
- OEM and ODM service provided
Available Covering Finishes of Bundy Tube:White zinc plated,Yellow zinc plated,Dark green plated,PVF..
Available Package Type of Bundy Tube :In roll,In bulk roll,In pancake,In straight or special request..
Our Copper-Brazed Steel Tubing confirm to the ASTM A254-97 Standard Specificaion.It can be used for fuel lines,brake lines,oil lines of Automotive uses,cooling units of refrigeration uses and stove industries.ect.It made by rolling steel trip into the form of tubing and subsequently copper brazing in a reducing atmosphere.After a various of analysis,like heat analysis and product analysis,and through tension tensile strength,flattening,expansion,bending and pressure proof test to ensure the quality.
Two types of copper-brazed steel tubing for choice:Single Strip Type or Double Strip Type.
| Dimensions and Tolerances | |||||
| Nominal Tubing OD | Outside Diameter | Wall Thickness | |||
| inch | mm | Basic mm | Tolerance± | Basic mm | Tolerance± |
| 3/16 | 4.76 | 4.78 | 0.08 | 0.71 | 0.08 |
| 1/4 | 6.35 | 6.35 | 0.08 | 0.71 | 0.08 |
| 5/16 | 8 | 7.92 | 0.08 | 0.71 | 0.08 |
| 3/8 | 9.52 | 9.53 | 0.08 | 0.71 | 0.08 |
| 1/2 | 12.7 | 12.7 | 0.1 | 0.89 | 0.09 |
Specification and Test
| Test Item | Technical Standard | Test result | |||||
| Mechanical Property | Tensile Strength290Mpa | 296Mpa | |||||
| Yield Strength 180Mpa | 185Mpa | ||||||
| Elongation20% | 30% | ||||||
| Wall Thickness | 0.70+-0.1mm | 0.71mm | |||||
| Flaring Test | Flaring25% | 30% | |||||
| Bending Test | Bend 180°C in a Radius Three Times of the Pipe Diameter | No Crafk or Peeling After Flaring | |||||
| Flattening Test | No Crack After Flattening | No Crack | |||||
| Pressure Test | No Leakage when Charged with 34.3Mpa Nitrogen Gas for 1min | No Leakage | |||||
| Thickness per Surface Treatment of Galvanize(μm) | 9μm | ||||||
| Thickness per Inner Treatment of Copper-Plating | 3μm | ||||||