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| Place of Origin | Changzhou |
| Brand Name | Joyruns |
| Certification | ISO9001,ROHS |
| Model Number | 3.16*0.5,4.76*0.5,4.76*0.6, 4.76*0.7, 6*0.6, 6*0.7, |
ASTM A254-97 BHG1 7.9*0.7mm Copper Coated Steel Bundy Tube
The Tube Applied for Condenser, Hydraulic System Industries, Copper brazed double-wall steel tube is made of steel strip which is copper plated on both sides. It has widely applied for automobiles, refrigerators and other hydraulic system industries.
Tube tolerance
| outer diameter (φ) | wall thickness tolerance(mm) | wall thickness(mm) |
diameter tolerance (mm) |
weight (g/m) | weight Zinc(g/m) | weight PVF (g/m) | resistance to pressure (Mpa) | length(m/ton) | |
| 4.75(3/16″) | ±0.05 | 0.7 |
±0.12common ± 0.08 Higher |
70 | 71 | 72 | 88 | 13889 | |
| 6 | ±0.05 | 0.7 |
±0.12common ± 0.08 Higher |
91 | 92 | 93 | 70 | 10753 | |
| 6.35(1/4″) | ±0.05 | 0.7 |
±0.12common ± 0.08 Higher |
97 | 98 | 99 | 64 | 10101 | |
| 8(5/16″) | ±0.05 | 0.7 |
±0.12common ± 0.08 Higher |
125 | 127 | 128 | 51 | 7813 | |
| 9.52(3/8″) | ±0.10 | 0.7 |
±0.12common ± 0.08 Higher |
152 | 153 | 154 | 43 | 6494 | |
| 10 | ±0.10 | 0.7 |
±0.12common ± 0.08 Higher |
160 | 162 | 163 | 41 | 6135 | |
| Mechanical Property | Yield Strength 6s ≥180Mpa Elongation δ≥25% Tensile Strength 6s ≥290Mpa |
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| Test item | Flaring Test / Bending Test / Flattening Test / Pressure Test / SalJt mist Test | ||||||||
Specification and performance of surface plating
| Mark | Type | Typical Appearance | Aiti-corrosion Time |
| A | Copper Tube | Bright or light blue | 6-8h |
| B | White Zinc Tube | Rainbow and white | 24-36h |
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