Optical wire (CuNiZn)
CuNiZn optical wires from bedra make an impression by a flawless surface finish which is required by all renowned optical manufacturers.
Fields of application
Rim, temple, bridge, hinge, closing block & pad arm
Physical properties
| Density (kg/dm³) | 8.7 |
|---|---|
| Melting range (°C) | 1060 - 1110 |
| E-Modulus (kN/mm²) | 135 |
| Thermal conductivity (W/m*K) | 33 |
| Coefficient of thermal expansion (10-6/K) | 17.7 |
| Electrical conductivity (MS/m) | 3.3 |
Standardization and composition
| Standard designation | CuNi18Zn20 |
|---|---|
| DIN | 17663 |
| Material no. | 2.0740 |
| DIN EN 12166 | CW409J |
| ASTM UNS | C75900 |
| Cu | 62 |
| Zn | balance |
| Ni | 18 |
| Others | max. 0,5 |
Other tech. Values
| Annealing temp. (°C) | 600 - 650 |
|---|---|
| Hardness annealed (HV) | 95 |
| Hardness 80% reduced (HV) | 250 |
Delivery program
| Profiles | Round wires / square profiles / flat wires / special profiles |
|---|---|
| Surface coatings | Several electroplated coatings, upon request |
| Make-ups | Spools / coils / rods / drums |
Further product information
Berkenhoff GmbH (headquarters)
- Kinzenbach plant
- Berkenhoffstrasse 14
- 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
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