bedra 18200
Chromium Copper
Characteristics:
It offers high electrical and thermal conductivity and good wear resistance. It maintains mechanical properties at elevated temperatures, making it suitable for applications involving heat.
Typical applications:
It is widely applied in motor commutators, collector rings, high-temperature switches, welding electrodes, rollers, grippers, brake discs, and other parts requiring high thermal conductivity, electrical conductivity, and high thermal strength, typically in the form of bimetal.
Standardization and composition
| UNS | C18200 |
|---|---|
| GB | TCr1 |
| Cu | balance |
| Cr | 0.6-1.2% |
| Fe | ≤ 0.1% |
| Si | ≤ 0.1% |
| Ni | ≤ 0.05% |
Physical properties①
Note①：The testing temperature is 20℃. Note②：The testing temperature range is 20℃ to 300℃.
| Density (g/cm³) | 8.9 |
|---|---|
| Electrical conductivity (%IACS) | 75 |
| Thermal conductivity (W / m x K) | 324 |
| Coefficient of thermal expansion② (10-6/K) | 17 |
| Modulus of elasticity (GPa) | 117 |
Fabrication Properties
Note③：C37700 = 100% Note④：C36000 = 100%
| Capacity for being cold worked | Excellent |
| Capacity for being hot formed | Good |
| Brazing | Good |
| Resistance welding | Not recommended |
| Machinability rating③ | 80% |
| Forgeability rating④ | 80% |
Mechanical Properties
| Diameter (mm) | Temper | Tensile Strength (MPa min.) | Yield Strength (MPa min.) | Elongation (% min.) | Hardness (HRB min.) |
|---|---|---|---|---|---|
| 5 ≤ Ф ≤ 16 | TH04 | 450 | 380 | 13 | 75 |
| 25 < Ф ≤ 50 | TH04 | 405 | 380 | 13 | 70 |
| 50 < Ф ≤ 75 | TH04 | 380 | 310 | 13 | 65 |
Dimension Tolerance and Delivery Form
Note⑤：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 | ||||
| Diameter (mm) | Tolerance⑤ (mm) | Ovality (mm) | Length (mm. max.) | Straightness (mm/m max.) |
| 5 ≤ Φ ≤ 10 | 0.06 | 0.03 | 4000 | 1.0 |
| 10 < Φ ≤ 20 | 0.10 | 0.05 | 4000 | 1.0 |
| 20 < Φ ≤ 25 | 0.16 | 0.08 | 4000 | 1.0 |
| 25 < Φ ≤ 30 | 0.18 | 0.09 | 4000 | 1.0 |
| 30 < Φ ≤ 40 | 0.20 | 0.10 | 4000 | 1.0 |
| 40 < Φ ≤ 45 | 0.24 | 0.12 | 4000 | 1.0 |
| 45 < Φ ≤ 45 | 0.30 | 0.15 | 4000 | 1.0 |
| 50 < Φ ≤ 60 | 0.34 | 0.17 | 4000 | 1.0 |
| 60 < Φ ≤ 80 | 0.44 | 0.22 | 2500 | 3.0 |
Further product information
PDF Datasheet | EN PDF Datasheet | VI PDF Datasheet | ZH
Please contact us
Sales Asia-Pacific (Excluding-India)
Sales India
Sales North America
Sales Europe
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
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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