B359 C44300 C44500 Copper Alloy Low Fin Tube U Bend For Heat Exchangers ASTM B154-16
B359 C44300 C44500 Copper Alloy Low Fin Tube U Bend for Heat Exchangers
B359 describes seamless copper and copper alloy tubing on which the external or internal surface, or both, has been modified by a cold-forming process to produce an integral enhanced surface for improved heat transfer. The tubes are used in surface condensers, evapora-
tors, and heat exchangers and are normally made from the following copper or copper alloys:
- C10100
- C10200
- C10300
- C10800
- C12000
- CI 2200
- C14200
- C19200
- C23000
- C44300
- C44400
- C44550
- C60800
- C68700
- C70400
- C70600
- C71000
- C71500
- C72200
B359 C44300 C44500 Copper Alloy Low Fin Tube U Bend Chemical Composition
| Element | Content (%) (ASTM B139 Requirements) |
| Copper (Cu) | Balance |
| Tin (Sn) | 9.0 – 11.0 |
| Phosphorus (P) | 0.03 – 0.35 |
| Lead (Pb) | ≤ 0.05 (max) |
| Iron (Fe) | ≤ 0.10 (max) |
| Zinc (Zn) | ≤ 0.30 (max) |
| Other Impurities | ≤ 0.50 (total) |
B359 C44300 C44500 Copper Alloy Low Fin Tube U Bend Mechanical Properties
| Property | Condition | Value (Typical) | Test Standard |
| Tensile Strength | Annealed | 325 – 380 MPa (47 – 55 ksi) | ASTM E8/E8M |
| Cold Worked | 485 – 620 MPa (70 – 90 ksi) | ||
| Yield Strength (0.2%) | Annealed | 125 – 170 MPa (18 – 25 ksi) | ASTM E8/E8M |
| Cold Worked | 415 – 550 MPa (60 – 80 ksi) | ||
| Elongation (%) | Annealed | 50 – 65% | ASTM E8/E8M |
| Cold Worked | 5 – 15% | ||
| Hardness | Annealed | 60 – 85 HV | ASTM E384 |
| Cold Worked | 150 – 190 HV | ||
| Electrical Conductivity | - | 13 – 15% IACS | ASTM B193 |
B359 C44300 C44500 Copper Alloy Low Fin Tube U Bend Drawing
B359 C44300 C44500 Copper Alloy Low Fin Tube U Bend TEST
- base tube: eddy current, hydraulic test, Mercurous Nitrate Test-B154, flaring, flattening etc..
- Final product: hydraulic test 3Mpa/5s
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