Alloy steel

Steel, to which metal alloy elements have been added to improve its properties.

Alloy steels are often called after the main alloy elements they contain: chromium-nickel steels (Cr-Ni); nickel-chromium-molybdenum steels (Ni-Cr-Mo). The names are often shortened for convenience, for example, the latter is more-commonly known as nickel-chrome-moly steel.

See also carbon steel, low alloy steel, high alloy steel .