Sep 13 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesMechanical PropertiesThermal PropertiesApplications
Introduction
Aluminium bronzes contain 5 to 12% of aluminium, nickel, silicon, manganese, and iron. They are copper alloys found in wrought and cast form. Due to the presence of hard, adherent, protective alumina film, they are stronger than brasses or tin bronzes. They have high corrosion resistance, and are available in golden color.
Chemical Composition
The chemical composition of the UNS C95410 copper alloy is outlined in the following table.
| Element |
Content (%) |
| Cu |
85 |
| Fe |
4 |
| Al |
11 |
| Ni |
2 |
Physical Properties
The physical properties of UNS C95410 copper alloy are tabulated below.
| Properties |
Metric |
Imperial |
| Density |
7.45 g/cm3 |
0.269 lb/in3 |
| Melting point |
1025 - 1040°C |
1877 - 1900°F |
Mechanical Properties
The following table shows mechanical properties of UNS C95410 copper alloy.
| 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) |
205MPa |
29700 psi |
| Tensile strength, yield (TQ50 temper) |
310 MPa |
45000 psi |
| Elongation at break (TQ50 temper, in 50 mm) |
8.00% |
8.00% |
| Elongation at break (as cast, in 50 mm) |
12.00% |
12.00% |
| Reduction of area (TQ50 temper) |
6.00% |
6.00% |
| Reduction of area (as cast) |
12.00% |
12.00% |
| 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 10E-5%/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 |
| 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 GPa |
5950 ksi |
Thermal Properties
The thermal properties of UNS C95410 copper alloy are outlined in the following table.
| Properties |
Metric |
Imperial |
| CTE, linear(@ 20.0 - 300°C/68.0°C - 572°F) |
16.2 μm/m°C |
9.00 μin/in°F |
| Specific heat capacity |
0.420 J/g°C |
0.100 BTU/lb°F |
| Thermal conductivity (@ 20.0°C/68.0°F) |
59.0 W/m-K |
409 BTU-in/hr-ft< sup> °F |
| Solidus |
1025°C |
1877°F |
| Liquidus |
1040°C |
1900°F |
Applications
Aluminium bronzes are mainly used in sea water applications that include:
- Bearings
- Pipe fittings
- Pumps and valve components
- Fasteners
- Heat exchangers