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Phosphor Bronze are alloys containing Copper, Tin and Phosphorous.
They are also known as Tin Bronzes, but always have some amount of Phosphorous present to be truly considered as Phosphor Bronze. Historically, it is one of the world's oldest metal alloys dating back 4000 years.
Phosphor Bronze form a major group of engineering alloys noted for their higher strength and stiffness resulting from the alloyed Tin and Phosphorous. The combination of good physical properties, fair electrical conductivity and moderate cost makes it a suitable choice where more expensive metals like beryllium copper are used.
Properties:Phosphor Bronze is a fatigue resistant alloy which can retain its strength over many cycles of loading.
The addition of Phosphorous acts as a deoxidising agent during the melting process and reduces the viscosity of the molten metal. This makes it easy to cast and reduce the grain boundaries.
The addition of tin in the alloy increases the corrosion resistance and strength while Phosphor increases the wear resistance and stiffness of the alloy.
These alloys also offer good thermal and electrical conductivity with excellent spring and plating properties.
The particular blend of mechanical properties, oxidation and low magnetic permeability can be used to the maximum advantage for critical applications.
AEPL Produces Phosphor Bronze ingots as per various International specifications.
For detailed information about specific alloy, kindly click on the below mentioned respective grades.
| Material Grade |
Chemical Composition | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| PB-1 | |||||||||
| ELEMENT | Cu | Al | Fe | Ni | Zn | Pb | Sn | P | |
| Min (%) | Balance | - | - | - | - | - | 10.00 | 0.50 | |
| Max (%) | 0.01 | 0.10 | 0.10 | 0.05 | 0.25 | 12.00 | 1.00 | ||
| PB-2 | |||||||||
| ELEMENT | Cu | Al | Fe | Ni | Zn | Pb | Sn | P | |
| Min (%) | Balance | - | - | - | - | - | 11.00 | 0.15 | |
| Max (%) | 0.01 | 0.10 | 0.50 | 0.30 | 0.50 | 13.00 | 0.60 | ||
| C-54400 | |||||||||
| ELEMENT | Cu | Al | Fe | Ni | Zn | Pb | Sn | P | |
| Min (%) | Balance | - | - | - | 1.50 | 3.00 | 3.50 | 0.01 | |
| Max (%) | - | 0.10 | - | 4.50 | 4.00 | 4.50 | 0.50 | ||
Note : OI Means Other Impurities
Applications:Phosphor Bronze alloys have typical applications in the below sectors:
Bearings, Bearings for Heavy Loads and Relatively Low Speeds, Gear Boxes, Gears, Restaurant Equipment, Speed Reducers, Valve Bodies, Worm Gears, Worm Wheels.
Electrical Connectors.
