Lingotto-4

Zinc alloy (Zamak) types

Several types of Zamak exist. The three types of Zamak alloys most currently used in die-casting are Zamak 12, Zamak 13 e Zamak 15.
These types differ by higher or lower copper content (0 to 3%). Copper is used to provide more hardness and resistance to Zamak alloys.

ZAMAK 12
Among Zamak alloys, ZAMAK 12 offers the best hardness and traction resistance qualities.

ZAMAK 13
Among other Zamak alloys, ZAMA 13 stands out for its great impact resistance behavior and for its higher dimensional stability with aging. Very good corrosion resistance when subject to severe environmental conditions.

ZAMAK 15
ZAMAK 15 combines good impact resistance and dimensional stability over time close to those that can be attained with Zamak 13 alloy. Its corrosion resistance is also good, even in critical environmental conditions.



































































Chemical Composition (%) ZAMAK 12

ZL2 – ZnAl4Cu3
ZAMAK 13

ZL3 – ZnAl4
ZAMAK 15

ZL5 – ZnAl4Cu1
Al 3.8 – 4.2 3.8 – 4.2 3.8 – 4.2
Cu 2.7 – 3.3 ≤ 0,03 0,7 – 1,1
Mg 0,035 – 0,060 0,035 – 0,060 0,035 – 0,060
Pb ≤ 0,0030 ≤ 0,0030 ≤ 0,0030
Fe ≤ 0,0200 ≤ 0,0200 ≤ 0,0200
Cd ≤ 0,0030 ≤ 0,0030 ≤ 0,0030
Sn ≤ 0,0010 ≤ 0,0010 ≤ 0,0010
Si ≤ 0,0200 ≤ 0,0200 ≤ 0,0200
Ni ≤ 0,0010 ≤ 0,0010 ≤ 0,0010





















































































Physical Properties ZAMAK 12

ZL2 – ZnAl4Cu3
ZAMAK 13

ZL3 – ZnAl4
ZAMAK 15

ZL5 – ZnAl4Cu1
Specific weigh Kg/dm³ 6,70 6,60 6,65
Melting point lowest °C

highest °C
379

389
380

386
380

386
Specific heat cal/g/°C 0,102 0,098 0,105
Thermal conductivity at 20°C Cal/sec/cm/°C 0,25 0,27 0,26
Resistivity μ Ω cm

Ω mm²/m
6,75

0,0675
6,40

0,0640
6,55

0,0655
Electrical conductivity at 20°C 1/ μ Ω cm

S m/mm²
0,146

14,6
0,157

15,7
0,153

15,3
Elastic modulus E Kg/mm² 10.000 10.000 10.000
Coefficient of thermal expansion x 10¯⁶/°C 27,7 27,4 27,4
Linear shrinkage % 1,25 1,17 1,17
Maximum melting temperature °C 480 480 480
Optimal range of pressure casting °C 400 ÷ 440 400 ÷ 440 400 ÷ 440
Temperature of molds under pressure °C 200 200 200





































Mechanical Specifications ZAMAK 12

ZL2 – ZnAl4Cu3
ZAMAK 13

ZL3 – ZnAl4
ZAMAK 15

ZL5 – ZnAl4Cu1
Breaking load Kg/mm₂ 30 ÷ 33 25 ÷ 28 28 ÷ 31
Elongation % 2 1,5 2
Brinell hardness Kg/mm² 85 ÷ 100 70 ÷ 85 80 ÷ 90
Resilience Kgm/mm² 1,5 2 1,5