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Aluminium bronzes are copper alloys, that contain about 5 to 12% of aluminium. In addition, aluminium bronzes also contain nickel, silicon, manganese, and iron. They are found in wrought and cast form. Due to the presence of hard, adherent, protective alumina film, they are stronger than that of brasses or tin bronzes. They have high corrosion resistance, and are golden in color.
1.High load capacity Good anti-wearing
2.Low coefficients of friction
3.Good heat conductivity
4.High corrosion resistence
5.Long life and maintenance-free
6.No contaminant by oil or grease
| Element | Content (%) |
|---|---|
| Cu | 85 |
| Fe | 4 |
| Al | 11 |
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.45 g/cm3 | 0.269 lb/in3 |
| Melting point | 1025 - 1040°C | 1877 - 1900°F |
| Properties | Metric | Imperial |
|---|---|---|
| Hardness, Brinell ( as cast; 3000 kg) | 170 | 170 |
| Hardness, Brinell(TQ50 temper; 3000 kg) | 195 | 195 |
| Hardness, Rockwell B (as cast) | 83 | 83 |
| Hardness, Rockwell B (TQ50 temper) | 94 | 94 |
| Tensile strength, ultimate (as cast) | 515 MPa | 74700 psi |
| Tensile strength, ultimate (TQ50 temper) | 620 MPa | 89900 psi |
| Tensile strength, yield ( as cast) | 205 MPa | 29700 psi |
| Tensile strength, yield(TQ50 temper) | 310 MPa | 45000 psi |
| Elongation at break (TQ50 temper, in 50 mm) | 8% | 8% |
| Elongation at break (as cast, in 50 mm) | 12% | 12% |
| Reduction of area (TQ50 temper) | 6% | 6% |
| Reduction of area (as cast) | 12% | 12% |
| Creep strength (for 10E-5%/h, at 425°C) | 20.0 MPa | 2900 psi |
| Creep strength (for 10E-5%/h, at 370°C) | 30.0 MPa | 4350 psi |
| Creep strength (for 10-E5%/h, at 315°C) | 51.0 MPa | 7400 psi |
| Creep strength (for 10E-5%/h, at 230°C) | 115 MPa | 16700 psi |
| Modulus of Elasticity | 110 GPa | 16000 ksi |
| Compressive strength ( as cast) | 940 MPa | 136000 psi |
| Compressive strength (TQ50 temper) | 1070 MPa | 155000 psi |
| Poisson’s ratio | 0.316 | 0.316 |
| Charpy impact (keyhole, TQ50 temper) | 9.00 J | 6.64 ft-lb |
| Charpy impact (keyhole, as cast) | 15.0 J | 11.1 ft-lb |
| Izod impact (TQ50 temper) | 15.0 J | 11.1 ft-lb |
| Izod impact (as cast) | 22.0 J | 16.2 ft-lb |
| Fatigue strength (@# of cycles 1.00e+8 , reverse bending) | 240 MPa | 34800 psi |
| Machinability (UNS C36000 (free-cutting brass) = 100%) | 60% | 60% |
| Shear modulus | 41.0 GPa | 5950 ksi |
