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The 7068 alloy offers some of the highest strength mechanical properties available in an extruded product. Most commonly used for aerospace, ordnance and light weight recreational applications where extremely high strength is required. Property levels are typically in the 100 KSI range for ultimate strengths.
| Other | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Weight % | Si | Fe | Cu | Mn | Mg | Cr | Zn | Ti | Each | Total | Aluminum |
| minimum | — | — | 1.60 | — | 2.20 | — | 7.30 | — | — | — | Remainder |
| maximum | 0.12 | 0.15 | 2.40 | 0.10 | 3.0 | 0.05 | 8.30 | 0.10 | 0.05 | 0.15 | |
| Characteristics | English | Metric | |
|---|---|---|---|
| Nominal density
(68°F/20°C) |
0.103 lbs/in3 | 2.85 Mg/m3 | |
| Melting range | 890°F- 1175°F | 476°C-635°C | |
| Coefficient of thermal expansion | Linear
68°F – 212°F 20°C – 100°C |
13.0 micro in/in- °F | 23.4 micro m/m- °K |
| Volumetric
68°F / 20°C |
3.78 x 10-5 in.3/in.3– °F | 68 x 10-6 m3/m3– °K | |
| Thermal conductivity
(68°F/20°C) |
T6, T6511 | 110 BTU/ft- hr – °F | 190 W/m – °K |
| Electrical conductivity
(68°F/20°C) |
Equal Volume | T6, T6511 | 31% IACS |
| T76, T76511 | 37.5% IACS |
| Temper | Tensile | Hardness | Shear | Fatigue | Modulus | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ultimate | Yield | Elongation/4D | Brinell
500 kg 10 mm |
Ultimate shearing
strength |
Endurance limit-R.R.Moore type | Modulus of elasticity | ||||||
| KSI | MPa | KSI | MPa | 0.500″ Dia. Specimen | KSI | MPa | KSI | MPa | KSIx103 | Gpa | ||
| T76,
T76511 |
89 | 614 | 83 | 572 | 9 | 170 | — | — | — | — | 10.4 | 71.7 |
| T6, T651 | 100 | 698 | 94 | 648 | 9 | 185 | 47 | 324 | — | — | 10.4 | 71.7 |
| T6, T6511 | 103 | 710 | 99 | 683 | 9 | 190 | 53 | 365 | — | — | 10.4 | 71.7 |
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