Zamak 5 should be consider when moderately greater hardness strength and creep resistance is require over Zamak 3. Zamak 5 has the same composition as Zamak 3 with the additional of 1% copper in order to increase strength (by approximately 10%), hardness and corrosive resistance over Zamak 3, but reduces ductility. It is the most widely used zinc alloy in Europe.
The density of the Zamak 5 is 6.85 g/cm3 and the melting point is 452 degree celcius This is an alloy researched and developed by General Motors.