Metallic chromium is mainly used in the production of nickel base, cobalt base superalloy, aluminum alloy, titanium alloy, resistance alloy, corrosion resistant alloy, iron base heat resistant alloy and stainless steel. There are two kinds of metallic chromium produced in the industry. One is aluminum pyrometallurgy, which is chrome, lumpy, bright silver, metallic luster and contains Cr> 98%. Different impurities have different requirements according to the application. The other one is electrolytic chrome, flake , The surface is dark brown, bright surface after hydrogen refining, with Cr> 99%.
On October 27, 2017, a preliminary list of carcinogens released by the World Health Organization's International Agency for Research on Cancer (IARC) was consulted, with chromium metal in the Category 3 carcinogen list.