Nov 13 2012
Topics Covered
IntroductionChemical CompositionMechanical PropertiesOther DesignationsFabrication and Heat Treatment Annealing Cold Working Welding Forging Machinability Hot Working
Introduction
Bronze alloys are many in number and they include:
- Phosphor bronze
- Tin bronze
- Aluminum bronze
- Silicon bronze
- Architectural bronze
- Manganese bronze
Phosphor bronze alloys were of great significance in the Bronze Age. The addition of phosphor in bronze alloys results in increased wear resistance, fatigue resistance and hardness, thus allowing the usage of the phosphor bronze alloys in shafts, fasteners, valve spindles, masonry fixings, bearings, springs and gears.
UNS C50500 alloy is a phosphor bronze copper alloy. The datasheet given below provides an overview of UNS C50500 alloy.
Chemical Composition
The chemical composition of UNS C50500 phosphor bronze copper alloy is outlined in the following table.
| Element |
Content (%) |
| Cu, Copper |
98.75 |
| Sn, Tin |
1.25 |
| P, Phosphorus |
trace |
Mechanical Properties
The mechanical properties of UNS C50500 copper alloy are displayed in the following table.
| Properties |
Metric |
Imperial |
| Poisson's ratio |
0.34 |
0.34 |
| Elastic modulus |
117 GPa |
16969 ksi |
Other Designations
Equivalent materials to UNS C50500 copper alloy are:
- ASTM B105
- ASTM B508
- ASTM B9
Fabrication and Heat Treatment
Annealing
UNS C50500 copper alloy is annealed between 482 and 649°C (900 and 1200°F).
Cold Working
UNS C50500 copper alloy has excellent cold working capacity.
Welding
Welding processes suitable for UNS C50500 copper alloy include brazing, gas shielded arc welding, soldering, coated metal arc welding, oxyacetylene welding and butt welding. Seam welding and spot welding processes are not recommended for this alloy.
Forging
UNS C50500 copper alloy is forged between 788 and 871°C (1450 and 1600°F).
Machinability
The machinability rating of UNS C50500 copper alloy is 20.
Hot Working
UNS C50500 copper alloy can be hot formed in a good manner.