to Wrought aluminum-zinc-magnesium alloys (7xxx)
to Properties of aluminum alloys
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| Wrought aluminum-zinc-magnesium alloy 7072 | ||||
| Chemical composition: Zn=1.0%, Al balance | ||||
| Property | Value in metric unit | Value in US unit | ||
| Density | 2.72 *10³ | kg/m³ | 170 | lb/ft³ |
|---|---|---|---|---|
| Modulus of elasticity | 70 | GPa | 10200 | ksi |
| Thermal expansion (20 ºC) | 23.6*10-6 | ºCˉ¹ | 13.1*10-6 | in/(in* ºF) |
| Specific heat capacity | 893 | J/(kg*K) | 0.213 | BTU/(lb*ºF) |
| Thermal conductivity | 222 | W/(m*K) | 1540 | BTU*in/(hr*ft²*ºF) |
| Electric resistivity | 2.99*10-8 | Ohm*m | 2.99*10-6 | Ohm*cm |
| Tensile strength (annealed) | 70 | MPa | 10200 | psi |
| Elongation (annealed) | 15 | % | 15 | % |
| Shear strength (annealed) | 55 | MPa | 8000 | psi |
| Hardness (annealed) | 20 | HB | 20 | HB |
| Tensile strength (H12) | 100 | MPa | 14500 | psi |
| Yield strength (H12) | 68 | MPa | 9860 | psi |
| Shear strength (H12) | 60 | MPa | 8700 | psi |
| Hardness (H12) | 28 | HB | 28 | HB |
| Annealing temperature | 343 | ºC | 650 | ºF |