zinc high pressure die casting
Zinc Alloy ZA2
With a high tensile strength, ZL2 is a Zinc based alloy which can be used for hot chamber pressure diecast components or gravity casting. Used for small castings where hardness and high tensile strength are essential, the high copper content of this alloy can reduce the dimensional stability. ZL2 also suffers from a severe loss of ductility during ageing and should be avoided if post forming of the casting is envisaged. When designing a stressed component using ZL2 further reference should be made to the alloys properties, at elevated temperatures, after natural or artificial ageing and the alloys creep properties.
Alloy Designation
ZnAL4Cu3
Short Designation
ZL 2
Colour Code
White + Green
Alloy Number
ZL0430
Mechanical Properties
Supplied in diecast form
Tensile Strength
As Cast
328 MPa
Aged
269 MPa
Yield strength
As Cast
221 MPa
Aged
N/A
Impact Strength
As Cast
47 Joules
Aged
68 Joules
Elongation 50mm
As Cast
7%
Aged
2%
Shear Strength
As Cast
317 MPa
Aged
214
Compressive Yield Strength
As Cast
269 MPa
Aged
183 MPa
Fatigue Strength
As Cast
59
Aged
N/A
Hardness BHN 500Kg
As Cast
100 max
Aged
98 max
Phyiscal Properties
Melting range
379 – 390 degC
Coefficient of Thermal expansion
27.4 um/m deg C
Electrical Conductivity
25 % IACS
Density
6.7 g / cm 3
Thermal Conductivity
105 W/m deg C
Electrical Resistivity
6.3694 u ohm-cm at 20 degC
Zinc Alloy ZA3
A general purpose alloy, ZL3 is primarily used for producing castings for a variety of applications on a hot chamber pressure diecasting 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 and toys. ZL3 is easily machined, buffed, polished, lacquered and electroplated for decorative or functional purposes. When designing a stressed component using ZL3 designers should refer to the alloy’s properties, at elevated temperatures, after natural or artificial ageing and the alloy’s creep properties.
Alloy Designation
ZnAL4
Short Designation
ZL 3
Colour Code
White + Yellow
Alloy Number
ZL0400
Mechanical Properties
Supplied in diecast form
Tensile Strength
As Cast
283 MPa
Aged
241 MPa
Yield Strength
As Cast
221 MPa
Aged
N/A
Impact strength
As Cast
58 Joules
Aged
56 Joules
Elongation 50mm
As Cast
10%
Aged
16%
Shear Strength
As Cast
214 MPa
Aged
N/A
Compressive Yield Strength
As Cast
413 MPa
Aged
N/A
Fatigue Strength
As Cast
48
Aged
N/A
Hardness BHN 500Kg
As Cast
82 max
Aged
82 max
Physical Properties
Melting Range
381 – 387 degC
Coefficient of Thermal Expansion
27.4 um/m deg C
Electrical Conductivity
27 % IACS
Density
6.7 g / cm 3
Thermal Conductivity
113 W/m deg C
Electrical Resistivity
6.3694 u ohm-cm at 20 degC
Zinc Alloy ZA5
ZL5 is generally used for castings that require moderately higher strength and hardness and where dimensional stability is not an important criterion in the product application. ZL5 is often specified for automotive applications in Europe. The alloy contains copper as specified alloying element, this promotes marginally better casting properties than the ZL3 alloy and improves mechanical properties. The nominal 1% makes the alloy more expensive and therefore its use should be restricted to applications requiring its higher properties. ZL5 will accept any finish specified for ZL3. When designing a stressed component using ZL5 further reference should be made to the alloys properties, at elevated temperatures, after natural or artificial ageing and the alloys creep properties.
Alloy Designation
ZnAL4Cu1
Short Designation
ZL 5
Colour Code
White + Black
Alloy Number
ZL0410
Mechanical Properties
Supplied in diecast form
Tensile Strength
As Cast
328 MPa
Aged
269 MPa
Yield Strength
As Cast
221 MPa
As Cast
N/A
Impact Strength
Aged
65 Joules
As Cast
54 Joules
Elongation 50mm
As Cast
7%
Aged
13%
Shear Strength
As Cast
262 MPa
Aged
N/A
Compressive Yield Strength
As Cast
599.8 MPa
Aged
N/A
Fatigue Strength
As Cast
56 MPa
Aged
N/A
Hardness BHN 500Kg
As Cast
91 max
Aged
80 max
Physical Properties
Melting Range
380 – 386 deg C
Coefficient of Thermal Expansion
27.4 um/m deg C
Electrical Conductivity
26 % IACS
Density
6.7 g / cm 3
Thermal Conductivity
109 W/m deg C
Electrical Resistivity
6.5359 u ohm-cm at 20 deg C
Zinc Alloy ZA27
ZL27 is a zinc alloy containing 27% aluminium. It has exceptionally high strength and excellent bearing properties. Originally this alloy was envisaged for use in the sand and gravity diecasting industries but, has subsequently found a niche market as a pressure diecasting alloy using cold chamber diecasting machines. ZL27 offers the extended tool life applicable to zinc alloys which, when combined with its higher strength and hardness makes the alloy an automatic choice when aluminium alloys are unable to meet the service conditions anticipated. When designing a stressed component using ZL27 further reference should be made to the alloys properties, at elevated temperatures, after natural or artificial ageing and the alloys creep properties.
Alloy Designation
ZnAL27Cu2
Short Designation
ZL 27
Colour Code
White + Violet
Alloy Number
ZL2720
Mechanical Properties
Supplied in diecast form
Tensile Strength
As Cast
426 MPa
Aged
360 MPa
Yield Strength
As Cast
371 MPa
Aged
317 MPa
Impact strength
As Cast
5 Joules
Aged
2.2 Joules
Elongation 50mm
As Cast
2.5%
Aged
3%
Shear Strength
As Cast
296 MPa
Aged
234 MPa
Compressive Yield Strength
As Cast
385 MPa
Aged
288 MPa
Fatigue Strength
As Cast
145 MPa
Aged
N/A
Hardness BHN 500Kg
As Cast
122 max
Aged
100 max
Physical Properties
Melting Range
376 – 484 deg C
Coefficient of Thermal Expansion
26 um/m deg C
Electrical Conductivity
29.7 % IACS
Density
5.0 g / cm 3
Thermal Conductivity
125.5 W/m deg C
Electrical Resistivity
5.8 u ohm-cm at 20 deg C