Properties of Beryllium (Be)
Beryllium is a chemical element with the symbol (Be) and atomic number 4. It is a lightweight, steel-gray metal that is relatively rare in the Earth’s crust. Beryllium has unique properties, such as high stiffness, low density, and excellent thermal conductivity, making it useful in various industrial applications.
The following table provides a comprehensive list of beryllium (Be) properties in both SI and US customary/Imperial units at normal temperature and pressure (NTP).
Click on the icon to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Crystal Structure | Hexagonal close-packed (hcp) |
| Atomic Number | 4 |
| Molar Mass | 9.01218 g/mol |
| Density | 1848 kg/m3 |
| Mechanical Properties | Metric |
| Young’s Modulus (E) | 318 GPa |
| Shear Modulus (G) | 156 GPa |
| Bulk Modulus (K) | 110 GPa |
| Poisson’s Ratio (ν) | 0.075 |
| Mohs Hardness | 5.5 |
| Thermal Properties | Metric |
| Melting Point | 1287 °C |
| Boiling Point | 2468 °C |
| Thermal Conductivity (27°C) | 200 W/m·K |
| Specific Heat Capacity (Cp) (25°C) | 1825 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 1.16×10-5 1/°C |
| Electrical Properties | Metric |
| Electrical Resistivity | 3.7×10-6 Ω·cm |
Unless stated otherwise, all values are taken at room temperature (approximately 20°C or 68°F) and 1 atm pressure. (1 atm = 101,325 Pa)
Related Pages
References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018. 2) CRC Handbook of Chemistry and Physics, 97th Edition. United Kingdom: CRC Press, 2016-2017. 3) A.M. Howatson, P.G. Lun, J.D. Todd, P.D. Engineering Tables and Data. United Kingdom: University of Oxford, Department of Engineering Science, 2009.