Maraging 300 Steel

Type C300 cobalt containing grade of maraging steel, produced by vacuum arc remelting, provides very high strength (nominally 300 ksi tensile) with an above average level of toughness. The alloy retains its strength up to 450°C and good notch impact is maintained down to minus 50°C and below. This material may be nitrided.

C300 is usually supplied in the annealed condition where the microstructure consists of fine martensite. This structure is then maraged (precipitation hardened) to achieve final properties employing a relatively low temperature that results in the required combination of high strength and toughness. The alloy has a density of 8.02 g/cc. We also process your maraging steel in-house across our network.

Machinability & Welding

Maraging steels are usually machined in the annealed condition however they can be machined in the maraged condition. Components can be machined close to finished dimensions as the low temperature maraging treatment results in minimal distortion. In addition, the small contraction of approximately 0.05% due to maraging results in good dimensional stability.

Typical Applications

Commercial applications for this engineering material include: