Aug 20 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesMechanical PropertiesThermal PropertiesOther DesignationsFabrication and Heat Treatment Machinability Welding Forging Hot Working Cold Working AnnealingApplications
Introduction
Aluminium bronze is an alloy, which consist of about 6% of nickel and iron, and 9 to 12% of aluminium. It has a golden color. The UNS C62400 copper alloy has high corrosion resistance, and good strength, and can be heat treated to improve/modify their properties.
The following datasheet gives an overview of the UNS C62400 copper alloy.
Chemical Composition
The following table shows the chemical composition of the UNS C62400 copper alloy.
| Element |
Content (%) |
| Copper, Cu |
82.8-88.0 |
| Aluminium, Al |
10.0-11.5 |
| Iron, Fe |
2.0-4.5 |
| Manganese, Mn |
≤0.3 |
| Silicon, Si |
≤0.25 |
| Tin, Sn |
≤0.2 |
| Other |
≤0.5 |
Physical Properties
The physical properties of the UNS C62400 copper alloy are tabulated below.
| Properties |
Metric |
Imperial |
| Density |
7.45 g/cc |
0.269 lb/in³ |
| Melting point |
1027°C |
1880°F |
Mechanical Properties
The mechanical properties of copper alloy UNS C62400 are given in the following table.
| Properties |
Metric |
Imperial |
| Hardness, Rockwell B |
92 |
92 |
| Tensile strength |
655 MPa |
95000 psi |
| Yield strength |
330 MPa |
47900 psi |
| Elongation at break (in 50 mm, 11% reduction in area) |
14% |
14% |
| Elastic modulus |
117 GPa |
17000 ksi |
| Poisson’s ratio |
0.34 |
0.34 |
| Charpy Impact (@ -23.0-27.0°C/ -9.40-80.6°F, keyhole) |
15.0 J |
11.1 ft-lb |
| Izod impact (@ -23.0-27.0°C/ -9.40-80.6°F) |
23.0 J |
17.0 ft-lb |
| Fatigue strength (@# of cycles 1.00e+8, reverse bending) |
235 MPa |
34100 psi |
| Machinability (UNS C36000 (free-cutting brass) = 100) |
50 |
50 |
| Shear modulus |
44 GPa |
6380 ksi |
Thermal Properties
The thermal properties of the UNS C62400 copper alloy are outlined in the following table.
| Properties |
Metric |
Imperial |
| Thermal expansion co-efficient (@ 20-300°C/ 68-572°F) |
16.5 µm/m°C |
9.17 µin/in°F |
| Thermal conductivity (@ 20°C/ 68°F) |
58.6 W/mK |
407 BTU in/hr.ft.²°F |
Other Designations
Other designations that are equivalent to the UNS C62400 copper alloy include:
- ASME SFA5.7
- ASTM B150
- SAE J461
- SAE J463
Fabrication and Heat Treatment
Machinability
The machinability rating of the UNS C62400 copper alloy is 50.
Welding
The UNS C62400 copper alloy can be welded using brazing, gas shielded arc welding, spot welding, butt welding, seam welding, and coated metal arc welding methods. Soldering, and oxyacetylene welding are not preferred for this alloy.
Forging
Copper alloy UNS C62400 can be forged at temperatures ranging from 760 to 885°C (1400 to 1625°F). The hot forgeability rating of the UNS C62400 copper alloy is 80.
Hot Working
The UNS C62400 copper alloy has good hot forming capacity.
Cold Working
UNS C62400 has poor cold working capacity.
Annealing
Annealing of copper alloy UNS C62400 can be performed at temperatures between 594 and 650°C (1100 and 1200°F).
Applications
Aluminium bronze alloy UNS C62400 is used in pump and valve components for industrial process streams, high strength fasteners, marine equipment, and pole line hardware.