Chromium MetalChromium is widely used for alloying steel and its alloys to give them corrosion and heat resistance. The most famous ball-bearing steels (about 1% Cr and 1% C), stainless steels (18% Cr and 8-10% Ni), resistance alloys - nichromes (60-80% Ni, 15-20% Cr) and heat resistance alloys (13-16% Cr) based on iron, nickel and cobalt.
The practical experience shows that the addition of chrome to steel leads to the following: - reduced grain size - increased hardenability - improved hardness and strength - improved ductility when chrome contents <1 % - low influence on oxidation resistance at high temperatures - improved strength at high temperatures
The presence of chromium in carbon steels improves their hardness and wear resistance.
Chromium alloyed cast irons are widely used.
High-temperature steels and alloys containing 13-60% Cr are used for making gas turbines and jet engines.
Chrome plating of metal products, i.e. electrochemical coating by a thin film of chromium, leads to their improved durability and service life.
Chrome is crushed to lumps of not more than 10 kg. The amount of fines passing through the sieve with mesh dimensions 10x10 mm, does not exceed 10% of the batch mass. Supplied in steel drums up to 300kg. The surface of the lumps has no distinct inclusions of slag, refractory materials and other foreign matter.
Density 7.53 g/cm3
Melting point 1830-1870 оС