Phosphor bronze C54400, nominally composed of 87.9% copper, 4.0% zinc, 4.0% tin, 4.0% lead, and 0.10% phosphorus, finds its primary application where strength and bearing properties are required, and, in addition, offers the corrosion resistant characteristic of the high tin phosphor bronzes. In particular, the alloy is noted for its stress corrosion cracking resistance and its high endurance limit. The high lead content makes it an extremely machinable alloy that is equaled by few in the wrought metal industry as a bearing alloy.

Characteristics

Hot Working

This alloy is not recommended for hot working due to its moderate tin and high lead content.

Cold Working

C54400 has good cold workability. When annealed, this alloy can be bent, formed, and cold worked. The lead content prevents severe cold working operations such as deep drawing from being successfully performed.

Joining

Joining by soldering is excellent and good by brazing. The lead content prevents successful welding.

Typical Uses

Typical applications include bushings, bearings, shafts, gears, pinions, thrust washers, valve parts and electrical connectors.