bedra 54440
Leaded Phosphor Bronze
Characteristics：
bedra 54400 is a phosphor bronze characterized by high machinability, toughness, strength and low coefficient of friction. The tin content enhances corrosion resistance and strength, while phosphorus refines the grain structure and improves wear resistance and stiffness. The addition of lead imparts free-machining properties compared to conventional bronzes.
Typical applications:
bedra 54400 is suitable for communication connectors, automobiles, heavy machinery, and other industrial precision components—such as bushings, discs, and bearings—where lubrication access is difficult.
Standardization and composition
| UNS | C54400 |
|---|---|
| EN | CuSn4Pb4Zn4 (CW456K) |
| JIS | C5441 |
| GB | QSn4-4-4 |
| Cu | balance |
| Pb | 3.0-4.0% |
| Sn | 3.5-4.5% |
| Zn | 1.5-4.5% |
| P | 0.01-0.5% |
| Fe | ≤ 0.1% |
Physical properties①
Note①：The testing temperature is 20℃. Note②：The testing temperature range is 20℃ to 300℃.
| Density (g/cm³) | 8.89 |
|---|---|
| Metling temperature (℃) | 999 |
| Electrical conductivity (%IACS) | 19 |
| Thermal conductivity (W / m x K) | 87 |
| Coefficient of thermal expansion② (10-6/K) | 16.6 |
| Modulus of elasticity (GPa) | 103.4 |
Fabrication Properties
Note③：C36000 = 100%
| Capacity for being cold worked | Good |
| Capacity for being hot formed | Poor |
| Brazing | Good |
| Resistance welding | Not recommended |
| Machinability rating③ | 80% |
Mechanical Properties④
Note④：bedra technical standards
| Diameter (mm) | Temper | Tensile Strength (MPa min.) | Yield Strength (MPa min.) | Elongation (% min.) | Hardness (HV5 min.) |
|---|---|---|---|---|---|
| 16 ≤ Ф < 25 | H04 | 380 | 300 | 12 | 130 |
| 25 ≤ Ф ≤ 50 | H04 | 345 | 280 | 15 | 120 |
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.) |
| 16 ≤ Φ < 20 | 0.07 | 0.04 | 4000 | 0.5 |
| 20 ≤ Φ < 30 | 0.10 | 0.05 | 4000 | 0.5 |
| 30 ≤ Φ < 50 | 0.16 | 0.08 | 4000 | 1.0 |
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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