bedra 15725
Al2O3 Dispersion Strengthened Copper
It is a low-alumina-content dispersion-strengthened copper, incorporating aluminum oxide (ceramic) particles within a copper matrix. The thermally stable nano-scale Al₂O₃ particles retard copper recrystallization, significantly increasing resistance to thermal softening and enhancing mechanical strength at elevated temperatures. It combines high electrical and thermal conductivity with good strength at elevated temperatures.
Typical applications:
It is mainly used for RWMA welding caps and electrodes. It is also used for solder gun tips, MIG contact tips, vacuum tubes, microwave tubes, X-ray tube components, high-voltage DC relay/contactor blades and switches, and glass-to-metal seals.
Standardization and composition
| UNS | C15725 |
|---|---|
| GB | TUA10.25 |
| Cu | ≥ 99.43% |
| Al2O3 | 0.43-0.51% |
| Pb | ≤ 0.01% |
| Fe | ≤ 0.01% |
Physical properties①
Note①：The testing temperature is 20℃. Note②：The testing temperature range is 20℃ to 300℃.
| Density (g/cm³) | 8.86 |
|---|---|
| Metling temperature (℃) | 980 |
| Electrical conductivity (%IACS) | ≥ 85 |
| Thermal conductivity (W / m x K) | 344 |
| Coefficient of thermal expansion② (10-6/K) | 16.6 |
| Modulus of elasticity (GPa) | 130 |
Fabrication Properties
| Capacity for being cold worked | Excellent |
| Capacity for being hot formed | Excellent |
| Brazing | Good |
Mechanical Properties③
Note③：bedra technical standards
| Diameter (mm) | Temper | Tensile Strength (MPa min.) | Yield Strength (MPa min.) | Elongation (% min.) | Hardness (HRB min.) |
|---|---|---|---|---|---|
| 12 ≤ Ф ≤ 20 | H01 | 420 | 380 | 17 | 72 |
| 12 ≤ Ф ≤ 20 | H02 | 450 | 420 | 13 | 74 |
Dimension Tolerance and Delivery Forms
Note④：The tolerances listed in the table are specified as all plus or all minus. When tolerances are specified as plus and minus (±), half the values given.
| Straight bar | Coil wire | |||||
| Diameter (mm) | Tolerance④ (mm) | Ovality (mm) | Length (mm. max.) | Straightness (mm/m max.) | ID(MM) | Weight(kg) |
| 12 ≤ Φ ≤ 15 | 0.1 | 0.005 | 3500 | 0.5 | 1000 | 300 |
| 15 ≤ Φ ≤ 16 | 0.1 | 0.005 | 4000 | 0.5 | 1200 | 500 |
| 16 ≤ Φ ≤ 20 | 0.1 | 0.075 | 4000 | 1.0 | / | / |
Further product information
PDF Datasheet | EN PDF Datasheet | VI PDF Datasheet | ZH
Please contact us
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Berkenhoff GmbH (headquarters)
- Kinzenbach plant
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- 35452 Heuchelheim
- Germany
- +49 641 601 0
- +49 641 601 222
- info(at)bedra.com
Berkenhoff GmbH
- Merkenbach plant
- Rehmühle 1
- 35745 Herborn
- Germany
- +49 2772 5002 0
- +49 2772 5002 155
- info(at)bedra.com
bedra Vietnam Alloy Material Co., Ltd
- Lot CN-06, Hoa Phu Industrial Park,
Mai Dinh Commune,
Hiep Hoa District, Bắc Ninh Province,
Vietnam
- +84 2043900104
- +84 2043900110
- info-asia(at)bedra.com
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