Imported boron carbide, boron carbide, titanium diboride, chromium diboride, boron nitride, hexagonal boron nitride, boron alloy, copper alloy of boron, boron steel alloy, high-purity boron rod, a boron film, boron particles, boron powder, amorphous boron powder traits: the element symbols: B, boron is black or silver-gray solid. The crystalline boron is black, a melting point of about 2300 ° C, boiling point of 3658 ° C, density 2.34 g / cm 3, hardness second only to diamond, more brittle purposes: It is mainly used to certain structural materials used in the metallurgy, the missile's rocket. Boron compounds in agriculture, medicine, glass industry is very versatile.