About Kirksite

Kirksite is an alloy comprised primarily of zinc.  It also contains
aluminum (3.5-4.5%), copper (2.5-3.5%).  Kirksite is primarily used for
sheet metal forming tooling and plastic injection molds for prototype
and short run production applications. Kirksite is also known as the zinc alloy Zamak 2.


There are several advantages to kirksite tooling
  • Low melting point allows fast turnaround
  • Good machinability, changes can be made easily
  • Accurate "precision" casting reduces need for machining, especially on draw dies
  • Can be electroplated
  • Excellent tensile strength (35,000 psi)
Kirksite hemming fixtures
Molten kirksite being poured in Husite's foundry
Kirksite sheet metal die
Molten kirksite in Husite's foundry
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