Zamak 2 has the highest strength and hardness of all the 4 percent aluminium zinc die-casting alloys and it is used when these properties are critical. The relatively high Cu contents makes it about 25 percent stronger than Zamak 5. After ageing it retains strength better than most zinc alloys and becomes more dimensionally stable but it has reduced impact strength and hardness. Because of the copper content, trim scrap should be segregated.


Alloying Elements (%)
Al 3.9 – 4.3
Mg 0.04 – 0.08
Cu 2.5 – 3.5
 Impurities Fe 0.075 Max
Cd 0.002 Max
Sn 0.002 Max
Pb 0.003 Max


Brinel Hardness 100

Compressive Strength (kg/mm2)

Melting Points 0C 390
Density kg.m3 6