Density, specific heat, and melting point of aluminum
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Main physical properties
The physical properties are determined by the degree of purity of the material, as well as the temperature.
| The index | Value |
| Density (99.996%Al) t° 20°C | 2.6989, g/cm3 |
| Density (99.996% Al) at 1000°С | 2,289, g/cm3 |
| Melting point, | 660°С: |
| Boiling point | 2452°С: |
| Heat of melting | 10.55 kJ/mol: |
| Heat of vaporization | 291.4 kJ/mol: |
| Vapor pressure, t° 660°C | 0.266 Pa |
| Vapor pressure, t° 1123 C | 13.3 Pa |
| 13.3 Pa Vapor pressure, t° 1279°C | 133 Pa |
| Specific heat capacity, t° 20 °C | 929.46 J/(kg*K |
| Specific heat capacity, t° 100 ° C | 931.98 J/(kg*K |
| Thermal conductivity, t° 20 °C | Thermal conductivity, t° 20°C 217 W/(m*K), |
| Thermal conductivity, t° 190 °C | Thermal conductivity, t° 190 °C 343 W/(m*K), |
| Dynamic viscosity, t° 800 ° C | 0.002 N-s/m2 |
| Dynamic viscosity, t° 1123 ° C , | 0.0015 N-c/m2 |
| T° 1279 °C, 0.0013 N-cf/m2 Dynamic viscosity, t° 1123 °C, 0.0015 N-cf/m2 | 0.0013 N-s/m2 |
Coefficient of linear expansion at t° 20-100 ° C, K -...24.58*10-6
Electrical conductivity relative to copper at 20°C, %...65.5
Specific electrical resistance, μOhm m... 0.0265
Temperature coefficient of electrical resistance... 0.042
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Corrosion resistance
Aluminum is highly corrosion resistant to corrosive environments such as sulfur dioxide, hydrogen sulfide, ammonia and other gases. Even at elevated temperatures, the metal does not corrode in water and is resistant to water vapors. However, as the amount of cations in water increases, aluminum corrosion processes are accelerated. Of the various elements and compounds, copper, mercury, and chlorine are the most active in accelerating aluminum corrosion. These chemical elements, as well as their compounds contribute to the destruction of the surface film of Al2 O3 dioxide, which serves as protection against the penetration of corrosion activators deep into the metal.
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