BearMet221
Aluminum Bronze
Characteristics：
It is a special high-strength nickel-aluminum bronze alloy with a significant addition of iron. The inclusion of nickel and iron boosts the alloy's strength without reducing its excellent ductility, toughness, and resistance to oxidation and corrosion. The alloy offers outstanding anti-galling and wear-resistant properties. It is widely used in aerospace and marine applications.
Typical applications:
Typical applications for BearMet 221 include aerospace landing gear components, wing flap bearings, marine fasteners (bolts and nuts), valve spindles, and components. It is also widely used for plunger tips, hydraulic bushings, valve balls, bushings, pump parts, valve guides and seats for automotive engines.
Standardization and composition
| EN | CuAl10Ni5Fe4 (CW307G) |
|---|---|
| GB | QAl10-4-4 |
| Cu | balance |
| Al | 8.5-11.0% |
| Fe | 3.0-5.0% |
| Ni | 4.0-6.0% |
| Mn | ≤1.0% |
Physical properties①
Note①：The testing temperature is 20℃. Note②：The testing temperature range is 20℃ to 300℃.
| Density (g/cm³) | 7.6 |
|---|---|
| Metling point(℃) | 1054 |
| Electrical conductivity (%IACS) | 7.0 |
| Thermal conductivity (W / m x K) | 39.1 |
| Coefficient of thermal expansion ②(10-6/K) | 15.6 |
| Modulus of elasticity (GPa) | 121 |
Fabrication Properties
Note③：C37700 = 100% Note④：C36000 = 100%
| Capacity for being cold worked | Poor |
| Capacity for being hot formed | Good |
| Brazing | Fair |
| Resistance welding | Good |
| Forgeability rating③ | 75% |
| Machinability rating④ | 30% |
Mechanical Properties⑤
Note⑤：bedra technical standards
| Diameter (mm) | Temper | Tensile Strength (MPa min.) | Yield Strength (MPa min.) | Elongation (A% min.) | Hardness⑤ (HB min.) |
|---|---|---|---|---|---|
| 8 ≤ Ф ≤ 120 | R680 | 680 | 320 | 10 | 170 |
| 10 ≤ Ф ≤ 120 | R740 | 740 | 400 | 8 | 200 |
Dimension 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.) |
| 8 ≤ Φ ＜ 10 | 0.12 | 0.06 | 3600 | 1.0 |
| 10 ≤ Φ ＜ 18 | 0.16 | 0.08 | 3600 | 1.0 |
| 18 ≤ Ф ＜ 50 | 0.20 | 0.10 | 4000 | 1.0 |
| 50 ≤ Ф ＜ 60 | 0.30 | 0.15 | 4000 | 1.0 |
| 60 ≤ Ф ＜ 70 | 0.30 | 0.15 | 4000 | 3.0 |
| 70 ≤ Ф ＜ 90 | 1.20 | 0.60 | 3000 | 3.0 |
| 90 ≤ Ф ≤ 120 | 2.0 | 0.80 | 2000 | 5.0 |
Other Delivery Forms
Profiles, Tubes, Plates, Busbars
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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