bedra 66800
Manganese Brass
Characteristics:
The addition of silicon and manganese enhances the strength and wear resistance of the alloy, while the addition of lead further improves its wear resistance and machinability. This copper alloy exhibits high strength and excellent wear resistance.
Typical applications:
It is used for hydraulic components such as sliding shoes, sliding blocks, return disc stops, and valve seats.
Standardization and composition
| UNS | C66800 |
|---|---|
| GB | HMn61-3-1 |
| Cu | 60-63% |
| Mn | 2.0-3.5% |
| Si | 0.5-1.5% |
| Pb≤ 0.5% | |
| Sn | ≤ 0.3% |
| Fe | ≤ 0.35% |
| Ni | ≤ 0.25% |
| Al | ≤ 0.25% |
| Zn | balance |
Physical properties①
Note①：The testing temperature is 20℃. Note②：The testing temperature range is 20℃ to 300℃.
| Density (g/cm³) | 8.2 |
|---|---|
| Electrical conductivity (%IACS) | 13 |
| Thermal conductivity (W / m x K) | 63 |
| Coefficient of linear mean expansion② (10-6/K) | 20.4 |
| Modulus of elasticity (GPa) | 110 |
Fabrication Properties
Note③：C37700 = 100% Note④：C36000 = 100%
| Cold workability | Poor |
| Hot workability | Excellent |
| Brazing | Good |
| Resistance welding | Not recommended |
| Forgeability rating③ | 100% |
| Machinability rating④ | 80% |
Mechanical Properties
| Diameter (mm) | Temper | Tensile Strength (MPa min.) | Yield Strength (MPa min.) | Elongation (A% min.) | Hardness(HV min.) |
|---|---|---|---|---|---|
| 6 ≤ Ф < 15 | HR50 | 485 | 345 | 15 | 120 |
| 15 ≤ Ф < 50 | HR50 | 440 | 320 | 15 | 110 |
| 50 ≤ Ф < 120 | M30 | 380 | 172 | 20 | 95 |
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.) |
| 6 ≤ Φ < 10 | 0.06 | 0.03 | 4000 | 0.3 |
| 10 ≤ Φ < 18 | 0.07 | 0.03 | 4000 | 0.3 |
| 18 ≤ Φ < 30 | 0.08 | 0.04 | 4000 | 0.5 |
| 30 ≤ Φ < 50 | 0.16 | 0.08 | 4000 | 0.5 |
| 5 ≤ Φ < 60 | 0.80 | 0.40 | 4000 | 1.0 |
| 60 ≤ Φ < 80 | 1.60 | 0.80 | 3000 | 1.0 |
| 80 ≤ Φ < 120 | 2.00 | 1.00 | 2500 | 5.0 |
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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