Chromium iron is an iron alloy composed of chromium and iron. It is an important alloy additive for steelmaking. Chromium iron is divided into high carbon chromium iron (with a carbon content of 4-8%), medium carbon chromium iron (with a carbon content of 0.5-4%), low carbon chromium iron (with a carbon content of 0.15-0.50%), micro carbon chromium iron (with a carbon content of 0.06%), ultrafine carbon chromium iron (with a carbon content of less than 0.03%), as well as silicon chromium alloy, nitrided chromium iron, etc.

The lower the carbon content of ferrochromium, the more difficult it is to refine, the higher the power consumption, the higher the cost, and ferrochromium with a carbon content of less than 2%. It is suitable for refining stainless steel, acid resistant steel, and various other low-carbon chromium steels. Chromium iron with a carbon content of over 4%, commonly used for refining ball bearing steel, and steel for automotive parts. Chromium iron containing about 5% chromium can be used as a chromium additive for alloy conversion to iron.