160 to 190 ºF (71 to 88 ºC) Low Melting Point 42.5% Bismuth Safe Metal Alloys

This is a Bismuth based non-eutectic alloy which has unique properties of shrinking immediately upon solidification and growing back to zero in 1 hour, followed by additional growth. This shrinkage-growth makes it an ideal alloy for proof casting and precision measurement of internal dimensions.