Carbon fiber is a high-strength, lightweight material with the following physical properties:
1. Low density and light weight. The density of carbon fiber is 1.5~2g/cm3, which is equivalent to 1/4 of the density of steel and 1/2 of the density of aluminum alloy.
2. High rigidity: The Young’s modulus (stiffness) of carbon fiber is about 230-600 GPa (GPa), which is much higher than many other materials. It has good rigidity and deformation resistance.
3. High strength, its tensile strength can reach 3000~4000MPa, and its elasticity is 4~5 times greater than steel and 6~7 times greater than aluminum.
4. It has anisotropy, small thermal expansion coefficient, thermal conductivity decreases with the increase of temperature, and is resistant to sudden cooling and rapid heating. It will not explode even if it suddenly drops from a high temperature of several thousand degrees to normal temperature.
5. High rigidity: The Young’s modulus (stiffness) of carbon fiber is about 230-600 GPa (GPa), which is much higher than many other materials and has good rigidity and deformation resistance.
6. It has good high temperature resistance and low temperature resistance. Carbon fiber can be used at 2000℃and will not melt or soften in a non-oxidizing atmosphere at 3000℃. At low temperatures of -180°C, steel becomes brittle than glass, while carbon fiber remains soft and does not become brittle.
7. Good electrical conductivity. At 25°C, the high modulus fiber is 775 μΩ/cm and the high strength fiber is 1500 μΩ/cm.
8. It has poor impact resistance and is easy to be damaged. This is its physical defect.
9.High strength: The tensile strength of carbon fiber can reach 3500-5000 MPa (MPa), which is stronger than most metal materials.
10. Brittleness: Although carbon fiber is very strong, it is relatively brittle and prone to breakage without significant deformation.
These properties make carbon fiber widely used in high-performance fields such as aerospace, automobiles, and sports equipment.
