CuSn8,CuSn4 Phosphor Bronze Strips

 Description

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).CuSn8 - UNS.C52100 Phosphor Bronze Strips

C52100 Details & Applications

CuSn8 - UNS.C52100 Phosphor Bronze Alloys, which is a 8% tin bronze distinguished by a very good combination of strength and electrical conductivity. It is used for connector and current-carrying springs in contacts. Among the 4-8% tin bronze C52100 exhibits the lowest electrical conductivity, the highest reachable strength is significantly higher than C51100 and C51000 and C51900. By means of an additional further tempering after the cold forming process the bendability can be further improved.

In addition, it has better corrosion resistance and good sliding properties. C52100 is used for springy components and sliding elements when increased strength and wear-resistance are required.

Chemical Composition for C51900 Phosphor Bronze Alloys

Sn: 7.50-8.50%

P:  0.03-0.35%

Zn: 0.20% Max.

Fe: 0.10% Max.

Pb: 0.05% Max.

Zn: Balance

Note: Copper plus additions equal 99.50% minimum.