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The AZ80A alloy has greater strength than AZ61A and requires the slowest rate of deformation of the magnesium-aluminum-zinc alloys. To develop maximum properties, both AZ80A and ZK60A are heat treated to the artificially aged (T5) condition; AZ80A may be given the T6 solution heat treatment, followed by artificial aging to provide maximum creep stability. AZ80A is not available in hollow shapes. Typical applications include extruded products and press forgings.
| Weight % | Al | Zn | Mn | Si | Cu | Ni | Fe | Other | Mg |
|---|---|---|---|---|---|---|---|---|---|
| minimum | 7.80 | 0.20 | 0.12 | — | — | — | — | — | Bal |
| maximum | 9.20 | 0.80 | — | 0.10 | 0.05 | 0.005 | 0.005 | 0.30 |
| Characteristics | English | Metric | ||
|---|---|---|---|---|
| Nominal density | 20°C / 68°F | 0.065 lbs/in3 | 1.8 g/cm3 | |
| Specific heat | 25°C / 78°F | 0.25 BTU/lb – °F | 1050 J/KG- °K | |
| Incipient melting | >=801 °F | >=427 °C | ||
| Coefficient of thermal
expansion |
20°C / 68°F | 14 micro in/in- °F | 26 micro m/m- °K | |
| Thermal conductivity | 100-200°C
(212-572°F) |
44 BTU/ft- hr – °F | 76 W/m – °K | |
| Electrical resistivity | 20°C / 68°F | 145 nΩ ∙ m | ||
| Electrical conductivity | Extruded condition
20°C / 68°F |
10.6 %IACS | ||
| Condition | Tensile | Hardness | Shear strength | |||||
|---|---|---|---|---|---|---|---|---|
| Ultimate | Yield | Elongation
in 50 mm (2 in.) |
Brinell
500 kg load, 10 mm ball |
|||||
| KSI | MPa | KSI | MPa | % | KSI | MPa | ||
| As extruded | 49 | 340 | 36 | 250 | 11 | 67 | 22 | 150 |
| Aged – T5 temper | 55 | 380 | 40 | 275 | 7 | 80 | 24 | 165 |
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