to Wrought aluminum-zinc-magnesium alloys (7xxx)
to Properties of aluminum alloys
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| Wrought aluminum-zinc-magnesium alloy 7039 | ||||
| Chemical composition: Mn=0.25%, Mg=2.8%, Cr=0.20%, Zn=4.0%, Al balance | ||||
| Property | Value in metric unit | Value in US unit | ||
| Density | 2.74 *10³ | kg/m³ | 171 | lb/ft³ |
|---|---|---|---|---|
| Modulus of elasticity | 70 | GPa | 10100 | ksi |
| Thermal expansion (20 ºC) | 23.4*10-6 | ºCˉ¹ | 13.0*10-6 | in/(in* ºF) |
| Specific heat capacity | 880 | J/(kg*K) | 0.210 | BTU/(lb*ºF) |
| Thermal conductivity | 140 | W/(m*K) | 972 | BTU*in/(hr*ft²*ºF) |
| Electric resistivity | 4.5*10-8 | Ohm*m | 4.5*10-6 | Ohm*cm |
| Tensile strength (annealed) | 230 | MPa | 33400 | psi |
| Yield strength (annealed) | 100 | MPa | 14500 | psi |
| Elongation (annealed) | 22 | % | 22 | % |
| Shear strength (annealed) | 140 | MPa | 20300 | psi |
| Hardness (annealed) | 61 | HB | 61 | HB |
| Tensile strength (T61) | 400 | MPa | 58000 | psi |
| Yield strength (T61) | 330 | MPa | 47900 | psi |
| Elongation (T61) | 13 | % | 13 | % |
| Shear strength (T61) | 235 | MPa | 34100 | psi |
| Fatigue strength (T61) | 160 | MPa | 23200 | psi |
| Hardness (T61) | 123 | HB | 123 | HB |
| Annealing temperature | 413 | ºC | 775 | ºF |
| Solution temperature | 499 | ºC | 930 | ºF |