bedra65500
Silicon Bronze
Characteristics:
This alloy delivers high strength, superior elasticity, good wear resistance and extended fatigue life with minimal elastic hysteresis. It exhibits an excellent cold-work hardening response, moderate conductivity, and broad corrosion resistance across atmospheric, marine, and mild chemical environments. It serves as an ideal, cost-effective alternative to beryllium copper.
Typical applications:
Key applications include electrical components—such as pins, terminals, connectors, motor brush holders, and battery contacts—as well as corrosion- and wear-resistant parts for the marine, chemical, and automotive industries, including pipe fittings, valve spools, and sensor springs.
Standardization and composition
| GB | T64730/QSi3-1 |
|---|---|
| UNS | C65500 |
| EN | CW116C/CuSi3Mn1 |
| JIS | / |
| Cu | Balance% |
| Si | 2.8~4.0% |
| Mn | 0.50~1.50% |
| Zn | ≤0.15% |
| Fe | ≤0.10% |
| Sn | ≤0.10% |
| Others | ≤0.50% |
Physical properties①
Note①：The testing temperature is 20℃. Note②：The testing temperature range is 20℃ to 300℃.
| Density(g/cm³) | 8.5 |
|---|---|
| Electrical conductivity(%IACS) | 7 |
| Thermal conductivity(W/(m·K)) | 36.3 |
| Coefficient of thermal expansion ②(10⁻⁶/K) | 18 |
| Modulus of elasticity(GPa) | 103 |
Fabrication Properties
Note③：C36000 = 100%
| Cold workability | Excellent |
| Hot workability | Excellent |
| Resistance welding | Excellent |
| Machinability ③ | 30% |
Mechanical Properties④
Note④：bedra technical standards
| Temper | Diameter(mm) | Tensile Strength(min.MPa) | Yield Strength(min.MPa) | Elongation(min.A%) | Hardness(min.HB) |
|---|---|---|---|---|---|
| H02 | 12≤Φ≤50 | 380 | 140 | 12 | 135 |
| H04 | 12≤Φ≤50 | 450 | 240 | 10 | 160 |
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) | Tolerance ⑤(mm) | Ovality(max.mm) | Length(max.mm) | Straightness(max.mm/m) |
| 12<Φ≤18 | 0.10 | 0.05 | 3600 | 0.3 |
| 18<Φ≤40 | 0.15 | 0.075 | 3600 | 0.4 |
| 40<Φ≤50 | 0.18 | 0.09 | 3600 | 0.5 |
Further product information
Please contact us
Sales Asia-Pacific (Excluding-India)
Sales India
Sales North America
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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