Abstract
The aging behavior of an as-cast lead alloy containing tin, strontium and aluminum has been investigated over the temperature range 298-423 K. After casting, the lead-rich dendritic grains of the alloy age harden to a peak Meyer hardness of 19.5 kgf mm super(-2) at room temperature (298 K) in about 50 h. Hardening presumably results from the general precipitation of coherent (Pb, Sn) sub(3)Sr. The general precipitate responsible for age hardening the grains appears to be stable at temperatures ranging from 298 to 373 K.