Aluminum alloy is made of pure aluminum in a variety of alloy elements, and steel is more light, has been used in aerospace, automotive, machinery, ships and other fields. Carbon fiber is the polyacrylonitrile-based fiber in the high temperature pre-oxidation, carbonization, not only light weight, but also by the high strength, high temperature, friction and other advantages, in the civilian industry and military industry are widely used. Which of the two materials is superior to each other?
 

Carbon fiber products

First look at the aluminum alloy, its density is only 2.5 ~ 2.88g / cm ^ 3, about steel (7.85g / cm ^ 3) one-third, the relative stiffness, to 8.5, while the steel is 1. The same quality components, the use of aluminum instead of steel, can get greater stiffness. Aluminum alloy tensile strength slightly inferior to the steel, about 160 ~ 400MPa, but after appropriate heat treatment, can reach 700MPa, and low alloy steel strength quite.
 

Look at the carbon fiber material, its density is lighter than aluminum, only 1.7g / cm ^ 3, tensile strength of 3000MPa, is more than four times the steel, the elastic modulus of 230GPa, thermal expansion coefficient of -1.4 ~ +7.1 × 10- 6, seismic, anti-fatigue, X-ray transmission rate is high, because it is a kind of heterosexual material, parallel to the fiber and perpendicular to the fiber direction of the performance is different, so the design can be strong, choose a different way of laying Can change the performance of the product, suitable for a variety of areas.