Extrusion of lead at low compressive pressures

Abstract

The extrusion of Pb and Pb–1Sb has been investigated at very low compressive pressures in the temperature range 25°–150°C. The results indicate that a threshold pressure is required for significant extrusion to occur. The threshold pressure is higher in Pb–1Sb than in Pb, and increases with decreasing temperature. The results are related to the problem of lead being extruded over very long periods of time from a breached container filled with lead. It is concluded that no significant extrusion of lead would occur.