ZL3 is a hot chamber pressure die casting zinc base alloy

ZL3 conforms to EN 1774 1997 Ingot Specification and is one of a family of versatile high-grade zinc alloys we can manufacture in.


ZL3 is a general-purpose alloy and is primarily used for producing castings for a variety of applications on a hot chamber pressure die casting machine. The alloy’s mechanical and physical properties make it ideal for use in castings for the engineering and automotive industry, household equipment and utensils, office equipment, builders’ hardware, locks, toys, giftware etc. ZL3 is easily machined, buffed, polished, lacquered and electroplated for decorative or functional purposes.

National Specifications

The composition of ZL3 conforms to the current EN 1774 1997 Standard, which is now common to all EU countries

Alloy Composition

Aluminium 3.8% 4.2%
Magnesium 0.035% 0.06%


Iron - 0.020%
Copper - 0.03
Lead - 0.003%
Cadmium - 0.003%
Tin - 0.001%
Nickel - 0.001%
Silicon - 0.02%
Typical as cast physical and mechanical properties
    Pressure Die Casting
Casting Temperature °C 405-425
Freezing Range °C 382-387
Specific Heat J/GK 0.4187
- (0.10)


Cm/m 1.17
(in/ft) (0.14)
Casting Shrinkage Mm/mm 0.006
(in/in) (0.006)
Thermal Conductivity at 18 °c W/m°C 113
(C.G.S) (0.27)
Thermal Expansion Linear

 per °c

- 28x10₆
    Pressure Diecasting
Electrical Conductivity

At 20°C



Specific Gravity - 6.7
Density Kg/m₃ 6700
(ib/in₃) (0.24)
Tensile Strength at 20°c N/mm² 283-241
(ib/in²) (41000)
Elongation at 20°C %in 2in 10-16%
Impact strength at 20°C

(unnotched samples)



Hardness BHN 42

Figures relate to material in casting form. Properties vary for different processes. Further data available on request.