1. CuSn4 - UNS.C51100 Phosphor Bronze Strips

 

C51100 Details & Applications

CuSn4 - UNS.C51100 Phosphor Bronze Alloys, with a nominal composition of 95.60% copper and 4.2% tin, deoxidized with phosphorus, possesses mechanical properties and fabricating characteristics similar to Phosphor Bronze 5% - C51000 alloy but with 35% higher electrical and thermal conductivity by virtue of the lower tin content. C51100 alloy also offers a combination of high strength and ductility, excellent spring properties, good bearing qualities and wear resistance, excellent corrosion resistance and good resistance to stress relaxation. The improved electrical conductivity as compared to UNS.C51000 allows for miniaturization of electric current-carrying contacts and connectors.

 

Chemical Composition for C51100 Phosphor Bronze Alloys

Sn: 3.50-4.90%

P:  0.03-0.35%

Zn: 0.30% Max.

Fe: 0.10% Max.

Pb: 0.05% Max.

Zn: Balance

 

2. CuSn5 - UNS.C51000 Phosphor Bronze Strips

 

C51000 Details & Applications

 

CuSn5 - UNS.C51000 Phosphor Bronze Alloys, with a nominal composition of 94.80% copper and 5.0% tin, deoxidized with 0.2% phosphorus is the most widely used of the phosphor bronzes, which offering an optimum combinations of such engineering properties as high strength and ductility, superior fatigue and spring characteristics, excellent corrosion resistance, durability for severe service, good bearing qualities with low friction and higher wear resistance, superior forming and spinning, resistance to stress relaxation and good joining properties. In most cases, C51000 alloy has adequate electrical and thermal properties for many current-carrying and heat transfer requirements.

 

C51000 Alloy typical applications for phosphor bronze include bearings, bushings, gears, pinions, shafts, thrust washers and valve parts.

 

 

Chemical Composition for C51000 Phosphor Bronze Alloys

Sn: 4.50-5.50%

P:  0.03-0.35%

Zn: 0.30% Max.

Fe: 0.10% Max.

Pb: 0.05% Max.

Zn: Balance

 

Note: Copper plus additions equal 99.50% minimum.