| Boron, B | |
|---|---|
| Categories: | MetalNonferrous MetalPure Element |
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Export data to your CAD/FEA program| Physical Properties | Metric | English | Comments | ||
|---|---|---|---|---|---|
| Density | 2.60 g/cc | 0.0939 lb/in³ | |||
| a Lattice Constant | 4.91 Å | 4.91 Å | |||
| c Lattice Constant | 12.6 Å | 12.6 Å | |||
| Chemical Properties | Metric | English | Comments | ||
| Atomic Mass | 10.811 | 10.811 | 1995 | ||
| Atomic Number | 5 | 5 | |||
| X-ray Absorption Edge | 66.289 Å | 66.289 Å | K | ||
| Electronegativity | 2.04 | 2.04 | Pauling | ||
| Ionic Radius | 0.230 Å | 0.230 Å | Crystal Ionic Radius for Valence +3 | ||
| 0.350 Å | 0.350 Å | Crystal Ionic Radius for Valence +1 | |||
| Mechanical Properties | Metric | English | Comments | ||
| Knoop Microhardness | 3300 | 3300 | |||
| Hardness, Mohs | 9.5 | 9.5 | |||
| Tensile Strength, Ultimate | 1.60 – 2.40 MPa | 232 – 348 psi | Amorphous | ||
| 2.60 – 3.10 MPa | 377 – 450 psi | Crystalline | |||
| Tensile Modulus | 0.440 GPa | 63.8 ksi | |||
| Compressive Strength | <= 0.500 MPa | <= 72.5 psi | B2O3 inclusions | ||
| Electrical Properties | Metric | English | Comments | ||
Electrical Resistivity  | 0.00200 ohm-cm @Temperature 600 °C | 0.00200 ohm-cm @Temperature 1110 °F | |||
| 0.0120 ohm-cm @Temperature 520 °C | 0.0120 ohm-cm @Temperature 968 °F | ||||
| 0.0400 ohm-cm @Temperature 320 °C | 0.0400 ohm-cm @Temperature 608 °F | ||||
| 30.0 ohm-cm @Temperature 170 °C | 30.0 ohm-cm @Temperature 338 °F | ||||
| 400 ohm-cm @Temperature 100 °C | 400 ohm-cm @Temperature 212 °F | ||||
| 6500 ohm-cm @Temperature 25.0 °C | 6500 ohm-cm @Temperature 77.0 °F | ||||
| 30000 ohm-cm @Temperature 0.000 °C | 30000 ohm-cm @Temperature 32.0 °F | ||||
| 40000 ohm-cm @Temperature -10.0 °C | 40000 ohm-cm @Temperature 14.0 °F | ||||
| 400000 ohm-cm @Temperature -150 °C | 400000 ohm-cm @Temperature -238 °F | ||||
| Magnetic Susceptibility | -6.20e-7 | -6.20e-7 | cgs/g | ||
| Band Gap | 1.55 eV | 1.55 eV | |||
| Electron Mobility, cm²/V-s | 10 | 10 | |||
| Thermal Properties | Metric | English | Comments | ||
| Heat of Fusion | 2050 J/g | 882 BTU/lb | |||
| Heat of Vaporization | 3140 J/g | 1350 BTU/lb | |||
| CTE, linear | 8.20 µm/m-°C @Temperature 20.0 – 100 °C | 4.56 µin/in-°F @Temperature 68.0 – 212 °F | |||
| Specific Heat Capacity | 0.0297 J/g-°C @Temperature -191 – -78.0 °C | 0.00710 BTU/lb-°F @Temperature -312 – -108 °F | |||
| 0.754 J/g-°C @Temperature -76.0 – 0.000 °C | 0.180 BTU/lb-°F @Temperature -105 – 32.0 °F | ||||
| 1.285 J/g-°C @Temperature 0.000 – 100 °C | 0.3071 BTU/lb-°F @Temperature 32.0 – 212 °F | ||||
| 1.62 J/g-°C @Temperature 100 °C | 0.387 BTU/lb-°F @Temperature 212 °F | ||||
| 1.976 J/g-°C @Temperature 500 °C | 0.4723 BTU/lb-°F @Temperature 932 °F | ||||
| 2.135 J/g-°C @Temperature 900 °C | 0.5103 BTU/lb-°F @Temperature 1650 °F | ||||
| Thermal Conductivity | 27.4 W/m-K | 190 BTU-in/hr-ft²-°F | |||
| Melting Point | 2300 °C | 4170 °F | |||
| Boiling Point | 4000 °C | 7230 °F | |||
| Heat of Formation | 397.1 kJ/mol | 397.1 kJ/mol | |||
| Debye Temperature | 1097 °C | 2007 °F | |||
| Optical Properties | Metric | English | Comments | ||
| Refractive Index | 3.40 | 3.40 | |||
| Component Elements Properties | Metric | English | Comments | ||
| Boron, B | 100 % | 100 % | |||
| Descriptive Properties | |||||
| CAS Number | 7440-42-8 | ||||
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