Topics CoveredIntroductionChemical CompositionPhysical PropertiesMechanical PropertiesThermal Properties Other DesignationsFabrication and Heat Treatment Machinability Welding Heat Treatment AnnealingApplications
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.
The following table shows chemical composition of UNS C95400 copper alloy.
The physical properties of UNS C95400 copper alloy are tabulated below:
||1025 - 1040°C
||1877 - 1900°F|
The following table shows mechanical properties of C95400 copper alloy.
|Hardness, Brinell ( as cast; 3000 kg)
|Hardness, Brinell(TQ50 temper; 3000 kg)
|Hardness, Rockwell B (as cast)
|Hardness, Rockwell B (TQ50 temper)
|Tensile strength, ultimate (as cast)
|Tensile strength, ultimate (TQ50 temper)
|Tensile strength, yield ( as cast)
|Tensile strength, yield(TQ50 temper)
|Elongation at break (TQ50 temper, in 50 mm)
|Elongation at break (as cast, in 50 mm)
|Reduction of area (TQ50 temper)
|Reduction of area (as cast)
|Creep strength (for 10E-5%/h, at 425°C)
|Creep strength (for 10E-5%/h, at 370°C)
|Creep strength (for 10-E5%/h, at 315°C)
|Creep strength (for 10E-5%/h, at 230°C)
|Modulus of Elasticity
|Compressive strength ( as cast)
|Compressive strength (TQ50 temper)
|Charpy impact (keyhole, TQ50 temper)
|Charpy impact (keyhole, as cast)
|Izod impact (TQ50 temper)
|Izod impact (as cast)
|Fatigue strength (@# of cycles 1.00e+8 , reverse bending)
|Machinability (UNS C36000 (free-cutting brass) = 100%)
The thermal properties of UNS C95400 copper alloy are outlined in the following table.
|CTE, linear (@ 20.0 - 300°C/68.0 - 572°F)
|Specific heat capacity
|Thermal conductivity (@ 20.0°C/68.0°F)
||409 BTU-in/hr-ft2 °F|
Other designations that are equivalent to UNS C95400 copper alloy include:
- ASME SB148
- ASME SB271
- ASTM B148
- ASTM B271
- ASTM B30
- ASTM B505
- ASTM B763
- ASTM B806
- MIL C-11866
- QQ C390
- SAE J461
- SAE J462
Fabrication and Heat Treatment
The machinability of UNS C95400 copper alloy is about 60%.
Soldering, carbon arc welding, brazing, coated metal arc welding, and gas shielded arc welding are most commonly used methods for welding UNS C95400 copper alloy.
UNS C95400 copper alloy is heated at a temperature of about 870 to 910°C (1600 to 1675°F). Stress is relieved at a temperature of about 316°C (600°F). It is then quenched in water.
UNS C95400 copper alloy is annealed at 620 to 660°C (1150 to 1225°F). The time taken for annealing is about 1 hr/in. of section thickness.
Aluminium bronzes are used in sea water applications that include:
- Pipe fittings
- Pumps and valve components
- Heat exchangers