ZL8 Datasheet
Zinc Alloy ZA8 – ZL8 is designed to extend the application range of zinc alloy diecastings. In the past zinc alloys were considered unsuitable for applications where moderate stress was anticipated at elevated temperatures. ZL8 was specifically developed to improve the creep resistance and offer the best creep resistance of all the pressure diecasting alloys. It should be specified for structural or stressed applications for which other zinc alloys would be unsuitable. Although the strongest of the hot chamber alloys, it all has all of the properties associated with zinc diecasting alloys.
The combination of higher strength, excellent dimensional stability, good surface finish and definition make it ideal for visible stressed parts which are subject to elevated temperatures during service. Finishes suitable for traditional pressure diecasting alloys can be applied to ZL8 castings with the same excellent results.
Typical applications for this alloy are under bonnet automotive parts, stressed parts for hazardous or mining applications, stressed electrical or computer parts microwave guides etc.
When designing a stressed component using ZL8 further reference should be made to the alloys properties, at elevated temperatures, after natural or artificial ageing and the alloys creep properties.
| Alloy Designation | ZnAL8Cu1 | Colour code | White + Blue |
| Short designation | ZL 8 | Alloy Number. | ZL0810 |
MECHANICAL PROPERTIES
| Supplied in diecast form. | As Cast | Aged |
| Tensile strength | 374 MPa | 297 MPa |
| Yield strength | 290 MPa | 225 MPa |
| Impact strength | 42 Joules | 17 Joules |
| Elongation 50mm | 8% | 20% |
| Shear strength | 276 MPa | 227 MPa |
| Compressive yield strength | 252 MPa | 171 MPa |
| Fatigue Strength | 103 MPa | – |
| Hardness BHN 500Kg | 106 max | 91 max |
PHYSICAL PROPERTIES
| Melting range | 374 - 404 deg C |
| Density | 6.3 g / cm 3 |
| Coefficient of Thermal expansion | 27.4 um/m deg C |
| Thermal Conductivity | 109 W/m deg C |
| Electrical Conductivity | 26 % IACS |
| Electrical Resistivity | 6.5359 u ohm-cm at 20 deg C |
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