Given its composition, 94.80% copper, 5.0% tin, and 0.2% phosphorus, the Alloys of Phosphor Bronze  CuSn5 - UNS.C51000 is the most common of the Phosphor Bronze. CuSn5 sets it apart. The bronze boasts a mix of fortitude coupled with malleability, fatigue, and spring properties. Moreover, it is corrosion-resistant and can withstand heavy-duty use. The bronze also has favourable bearing properties with low friction and moderate wear. The bronze can be spun and formed with minimal stress, and it joins well. The alloy is also capable of moderate thermal and electrical conductivity, which is acceptable for most applications requiring the transfer of heat and electricity. 

This alloy is also called CuSn5 for Bourdon Tubes. The alloy has bronze and copper mixed with a high level of tin and phosphorus, which provides the alloy with adequate corrosion resistance and high wear resistance. Spring gauges and other tools wear the most; Phosphor Bronze is used for these applications due to its superior resistance.

Chemical Composition:

Sn: 4.50-5.50%
P:  0.03-0.35%
Zn: 0.30% Max.
Fe: 0.10% Max.
Pb: 0.05% Max.
Zn: Balance

Properties Of C51000 CuSn5 Copper Alloy Tube