bedra 67400
Manganese Brass
Characteristics:
It is a copper-based multi-element alloy in the Cu-Zn-Mn-Al-Si-Pb system. The addition of silicon and manganese improves the strength and wear resistance of the alloy, while aluminum increases its yield strength. Moreover, the addition of lead enhances both wear resistance and machinability. This alloy is characterized by high strength and excellent wear resistance due to the presence of wear-resistant phases in its microstructure.
Typical applications:
It is widely used in valve guides, floating and thrust bearings, synchronizer gears for the automotive industry, as well as sliding shoes, oil distribution pans, ball hinges, cylinder blocks, and bushings for the hydraulic industry.
Standardization and composition
| UNS | C67400 |
|---|---|
| EN | CuZn37Mn3Al2PbSi (CW713R) |
| GB | HMn57-2-1.7-0.5 |
| Cu | 57.0-60.0% |
| Mn | 2.0-3.5% |
| Si | 0.5-1.5% |
| Al | 0.5-2.0% |
| Pb | ≤ 0.5% |
| Fe | ≤ 0.35% |
| Sn | ≤ 0.3% |
| Ni | ≤ 0.25% |
| Zn | balance |
Physical properties①
Note①：The testing temperature is 20℃. Note②：The testing temperature range is 20℃ to 300℃.
| Density (g/cm³) | 8.08 |
|---|---|
| Electrical conductivity (%IACS) | 23 |
| Thermal conductivity (W / m x K) | 100 |
| Coefficient of thermal expansion② (10-6/K) | 19.1 |
| Modulus of elasticity (GPa) | 110.3 |
Fabrication Properties
Note③：C37700 = 100% Note④：C36000 = 100%
| Capacity for being cold worked | Poor |
| Capacity for being hot formed | Excellent |
| Brazing | Good |
| Resistance welding | Good |
| Forgeability rating③ | 100% |
| Machinability rating④ | 30% |
Mechanical Properties⑤
Note⑤：bedra technical standards
| Diameter (mm) | Temper | Tensile Strength (MPa min.) | Yield Strength (MPa min.) | Elongation (% min.) | Hardness (HB min.) |
|---|---|---|---|---|---|
| Ф ≤ 25 | HR50 | 537 | 275 | 8 | 84 |
| 25 < Ф ≤ 50 | HR50 | 517 | 275 | 10 | 80 |
| 50 < Ф ≤ 75 | HR50 | 482 | 248 | 10 | 78 |
Tolerance and Delivery Form
Note⑥：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) | Tolerance⑥ (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 |
| 50 < 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
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