Low Carbon Steel
(Also called mild steel) Has less than 0. 3% carbon. Used for components that do not require high strength. Improved machinability is found in the 11xx and 12xx series steels.
Medium Carbon Steel
Has 0.3% to o.6% carbon. Used for components requiring higher strength than low-carbon steels. Improved machinability is found in the 11xx and 12xx series steels.
High Carbon Steel
Has more than o.6% carbon. The higher carbon content results in higher strength, hardness, and wear resistance.
Low Alloy Steel
Contain significant amounts of other alloying elements in addition to carbon. Exhibit improved strength, hardness, toughness, wear resistance, corrosion resistance, hardenability, and hot
hardness (compared to carbon steels).
Specially alloyed steels designed for high strength, impact toughness, and wear resistance. Commonly used for machining and/or forming metals.
Generally contain 32% to 67% iron. This group includes low-expansion steel, maraging steel, and some of the iron-based superalloys.