Sep 26 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesMechanical PropertiesOther DesignationsFabrication and Heat Treatment Machinability Welding Forging Hot Working Cold Working AnnealingApplications
Introduction
UNS C64200 aluminium / aluminum bronze is a copper alloy with a combination of 5 – 12%. In addition to aluminium, iron, nickel, manganese and silicon in cast and wrought form are present in the alloy.
A hard, adherent, protective alumina film present in this alloy makes the alloy better resistant to corrosion and stronger than typical brasses and tin bronzes. UNS C64200 comes in an attractive golden color which does not tarnish much with time.
Chemical Composition
The following table shows the chemical composition of UNS C64200 copper alloys.
| Element |
Content (%) |
| Cu |
91.2 |
| Al |
7.0 |
Physical Properties
The following table gives the physical properties of UNS C64200 copper alloys.
| Properties |
Metric |
Imperial |
| Density |
8.8-8.94(g/cm3) |
0.32(lb/in3) |
| Melting point |
982°C |
1800°F |
Mechanical Properties
The mechanical properties of UNS C64200 copper alloys are tabulated below.
| Properties |
Metric |
Imperial |
| Poisson's ratio |
0.34 |
0.34 |
| Elastic modulus |
16000 GPa |
16969 ksi |
Other Designations
Other designations that are equivalent to UNS C64200 copper alloys include:
- UNS C64200
- ASME SB150
- ASME SB283
- ASTM B124
- ASTM B150
- ASTM B283
- ASTM F467
- ASTM F468
- SAE J461
- SAE J463
Fabrication and Heat Treatment
Machinability
The machinability rating of UNS C64200 alloy is 60%.
Welding
The following are the recommendations of UNS C64200 welding:
- Soldering - not recommended
- Brazing - fair
- Oxyacetylene welding - not recommended
- Gas shielded arc welding is rated – fair
- Coated metal arc welding is rated – fair
- Spot welding is rated – fair
- Seam welding is rated – fair
- Butt welding is rated -fair
Forging
The hot forgeability rating of UNS C64200 is 80%. The hot working temperature for this alloy is between 1300 and 1600ºF.
Hot Working
UNS C64200 copper alloys have excellent hot working property.
Cold Working
UNS C64200 copper alloys have poor cold working property.
Annealing
Annealing of UNS C64200 is performed between 1100 and 1300ºF.
Applications
The following are the major applications of UNS C64200 copper alloys:
- Valve and pump components for industrial process streams
- Marine equipment
- High strength fasteners
- Pole line hardware