Similar alloys with the addition of a small amount of lead can be cold-rolled into sheets. An alloy of 96% zinc and 4% aluminium is used to make stamping dies for low production run applications for which ferrous metal dies would be too expensive. In building facades, roofs or other applications in which zinc is used as sheet metal and for methods such as deep drawing, roll forming or bending, zinc alloys with titanium and copper are used. Unalloyed zinc is too brittle for these kinds of manufacturing processes. COUNT 4
QSN1 What can be done when small amounts of lead are added to alloys? ANS1 cold-rolled into sheets QSN2 What is made with an alloy of 4% aluminium mixed with 96% zinc? ANS2 stamping dies QSN3 Why are alloys used to make stamping dies rather than metal? ANS3 too expensive QSN4 Why isn't unalloyed zinc used in construction applications? ANS4 too brittle