Maraging steels are low-carbon, highly alloyed steels that are very high in strength. They contain 18% nickel and 7% cobalt, along with less than 0.05% carbon and small amounts of other elements like titanium. When cooled from the austenitizing temperature of 723°C, they develop martensite to achieve high tensile strength through precipitation hardening. Maraging steels are characterized by good machinability, weldability, and dimensional stability when heat treated. They find applications in components subjected to impact fatigue like gun barrels and printer hammers due to their high strength.