bedra 93200
High Leaded Tin Bronze
Characteristics：
bedra 93200 is a continuous cast leaded tin bronze alloy. It exhibits excellent machinability while maintaining favorable thermal conductivity and good lubricity due to its lead content. It is one of the most popular general-purpose bearing alloys, valued for its strength, hardness, and shock resistance. This alloy is particularly suitable for heavily loaded, lubricated, and true-running bearings.
Typical applications:
bedra 93200 is widely used in automotive fittings, thrust washers, machinery components, pumps, valves, and a wide range of bushings and bearings.
Standardization and composition
| UNS | C93200 |
|---|---|
| EN | CuSn7Zn4Pb7 (CB493K) |
| GB | ZQSn7-7-3 |
| Cu | 81-85% |
| Pb | 6.0-8.0% |
| Sn | 6.3-7.5% |
| Zn | 1.0-4.0% |
| P | ≤ 0.15% |
| Ni | ≤ 1.0% |
| Fe | ≤ 0.2% |
Physical properties①
Note①：The testing temperature is 20℃. Note②：The testing temperature range is 20℃ to 300℃.
| Density (g/cm³) | 8.91 |
|---|---|
| Metling temperature (℃) | 977 |
| Electrical conductivity (%IACS) | 12 |
| Thermal conductivity (W / m x K) | 58.2 |
| Coefficient of thermal expansion② (10-6/K) | 17.3 |
| Modulus of elasticity (GPa) | 100 |
Fabrication Properties
Note③：C36000 = 100%
| Cold workability | Good |
| Hot workability | Poor |
| Brazing | Good |
| Resistance welding | Not recommended |
| Machinability rating③ | 70% |
Mechanical Properties
| Diameter (mm) | Temper | Tensile Strength (MPa min.) | Yield Strength (MPa min.) | Elongation (% min.) | Hardness (HBW min.) |
|---|---|---|---|---|---|
| 15 ≤ Ф < 12 | M07 | 245 | 140 | 10 | 65 |
Dimension Tolerance and Delivery Form
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 | ||||
| Diameter (mm) | Tolerance④ (mm) | Ovality (mm) | Length (mm. max.) | Straightness (mm/m max.) |
| 15 ≤ Φ < 30 | 0.1 | 0.05 | 4000 | 0.5 |
| 30 ≤ Φ < 60 | 0.2 | 0.10 | 4000 | 0.5 |
| 60 ≤ Φ < 80 | 1.0 | 0.50 | 4000 | 1.0 |
| 80 ≤ Φ ≤ 100 | 1.6 | 0.80 | 3000 | 1.0 |
Other Delivery Forms
Tubes
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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