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What is Phosphor Bronze?

 When Bronze contains phosphorus, it is called phosphorus bronze. The composition of this metal varies according to weather it is to be forged and wrought or weather made into castings. A common type of  wrought phosphor bronze has copper 93.7, tin 6 , and phosphorus 0.3 per cent.

Phosphorus increases the strength, ductility and soundness of castings. The alloy possesses good wearing quality and high elasticity. The metal is resistant to salt water corrosion.


It is used for all average bearings in which wearing qualities are desired. Pump parts, linings and propellers are examples of cast manufacture. A variety of phosphor bronze suitable for casting contains 11 percent and 0.3 per cent phosphorus alloyed with copper. This is used for bearings which must carry heavy loads, worm wheels, gears, nuts for machine lead screws, springs and many other purposes. 


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