The main function of leaded bronze group of alloys is to improve machinability. They are known for their resistance towards corrosion and abrasion and their long service life. Common applications include connectors for wire and cable, electrical plug type connectors, door knobs, screws and nuts, bushings for corrosion, rolling mill bearings, and many more.The lead content in these alloys is between 7 percent and 30 percent. High-leaded tin bronzes are free cutting and retain favorable thermal conductivity and good lubricity due to the lead content. These alloys perform excellent in unforgiving environments where foreign matter may be present, such as dirt and other foreign materials.