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Chromium is a lightweight blue-silvery white metal. The name chromium comes from the Greek "chroma" and means color.
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 23.0 °C | 7.15 g/cm³ |
Molar mass | 52 g/mol |
Mechanical
| Property | Temperature | Value |
|---|---|---|
Elastic modulus | 23.0 °C | 290 GPa |
Hardness, Vickers, 10 | 23.0 °C | 180 - 250 [-] |
Poisson's ratio | 23.0 °C | 0.21 [-] |
Thermal
| Property | Temperature | Value |
|---|---|---|
Boiling point | 2672 °C | |
Coefficient of thermal expansion | 23.0 °C | 6.2E-6 1/K |
Melting point | 1900 °C | |
Specific heat capacity | 23.0 °C | 450 J/(kg·K) |
Thermal conductivity | 23.0 °C | 93.7 W/(m·K) |
Electrical
| Property | Temperature | Value |
|---|---|---|
Electrical conductivity | 23.0 °C | 7.90E+6 S/m |
Electrical resistivity | 23.0 °C | 1.3E-7 Ω·m |
Electron work function | 23.0 °C | 4.5 eV |
Acoustical
| Property | Temperature | Value |
|---|---|---|
Sound speed, longitudinal | 23.0 °C | 6850 m/s |
Sound speed, transversal | 23.0 °C | 3980 m/s |
Chemical properties
| Property | Value | Comment | |
|---|---|---|---|
Carbon | 0.03 % | ||
Chromium | 99.8 % | min | |
Iron | 0.15 % | ||
Molybdenum | 0.005 | ||
Nitrogen | 0.02 % | ||
Other | 0.03 % | ||
Oxygen | 0.1 % | ||
Silicon | 0.05 % | ||
Tungsten | 5E-3 % | ||
Technological properties
| Property | ||
|---|---|---|
| Application areas | Thanks to its very high corrosion resistance against many different acids and bases as well as hot gases, chromium is a popular material for all types of protective coating. In combustion equipment, chromium is used as a wear-resistant coating to increase the service life of specific components. As a component in high-temperature fuel cells, chromium also performs brilliantly. Alongside these applications, chromium is also used as a brilliant decorative coating for operating elements on appliances or for jewellery. | |
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