PROMET 420, leaded tin bronze EN 1982-CuSn5Pb20-C-GC/GZ,
Soft leaded tin bronze has the best sliding and emergency lubrication properties. It adapts well to edge pressure. Its friction coefficient is small with dry friction and it is best applicable in water lubricated bearings. Because it is relatively soft and plastic metal, it can absorb strange, hard particles, which otherwise would damage the shaft. It is very resistant to the corrosive effect of sulphuric acid. Excellent machinability.