Aug 20 2012
Topics Covered
IntroductionChemical
CompositionPhysical PropertiesMechanical PropertiesThermal PropertiesFabrication and Heat Treatment Machinability Welding Forging Hot
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 C62500 copper alloy has
good corrosion resistance. It is also commonly available as rod and flat products.
The following datasheet gives details about the UNS C62500 copper alloy.
Chemical Composition
The following table shows the chemical composition of UNS C62500 copper
alloys.
| Element |
Content
(%) |
| Copper, Cu |
82.7 |
| Aluminium, Al |
12.5-13.5 |
| Iron, Fe |
3.5-5.0 |
| Manganese, Mn |
≤2.0 |
| Other |
≤0.5 |
Physical Properties
The physical properties of UNS C62500 copper alloys are given in the
following table.
| Properties |
Metric |
Imperial |
| Density |
7.21 g/cc |
0.260 lb/in³ |
| Melting point |
1047°C |
1917°F |
Mechanical Properties
The mechanical properties of UNS C62500 copper alloys are tabulated
below.
| Properties |
Metric |
Imperial |
| Hardness, Rockwell C |
27 |
27 |
| Tensile strength (M30 and O61 tempers) |
690 MPa |
100000 psi |
| Yield strength (M30 and O61 tempers) |
380 MPa |
55100 psi |
| Elongation at break (in 50 mm, 1% reduction in
area) |
1.00% |
1.00% |
| Elastic modulus |
117 GPa |
17000 ksi |
| Compressive yield strength (at permanent set of
0.1%) |
450 MPa |
65300 psi |
| Compressive yield strength (at permanent set of
1%) |
880 MPa |
128000 psi |
| Poisson’s ratio |
0.34 |
0.34 |
| Charpy impact (@ 18.0 - 100°C/ -0.400 - 212°F,
keyhole) |
3.00 J |
2.21 ft-lb |
| Izod impact (@ 18.0 - 100°C/ -0.400 - 212°F) |
3.00 J |
2.21 ft-lb |
| Fatigue strength (@# of cycles 1.00e+8, M30
temper) |
460 MPa |
66700 psi |
| Machinability (UNS C36000 (free-cutting brass) =
100) |
20 |
20 |
| Shear modulus |
42.3 GPa |
6140 ksi |
Thermal Properties
The thermal properties of UNS C62500 copper alloys are outlined in the
following table.
| Properties |
Metric |
Imperial |
| Thermal expansion co-efficient (@
20-300°C/68-572°F) |
16.2 µm/m°C |
9.00 µin/in°F |
| Thermal conductivity (@ 20°C/ 68°F) |
38.9 W/mK |
270 BTU in/hr.ft².°F |
Fabrication and Heat Treatment
Machinability
The machinability rating of the UNS C62500 copper alloy is 20.
Welding
The UNS C62500 copper alloy can be welded using coated metal arc welding,
brazing, gas shielded arc welding, seam welding, spot welding, and butt welding
methods. It is suggested that soldering and oxyacetylene welding techniques
should not be used for welding these alloys.
Forging
UNS C62500 copper alloys can be forged at temperature ranging from 746 to
844°C (1375 to 1550°F). Hot forgeability rate of UNS C62500 copper alloys is
80.
Hot Working
UNS C62500 has good hot forming capacity.
Annealing
Annealing of UNS C62500 can be performed at temperatures
ranging from 594 to 650°C (1100 to 1200°F).
Applications
The copper alloy UNS C6240 are used in pump and valve components for industrial
process streams, high strength fasteners, marine equipment, and pole line
hardware.