Case Hardening 440c Stainless Steel

Standard stock grades include 1060 carbon and 440c stainless.

Case hardening 440c stainless steel.

It has high strength moderate corrosion resistance and good hardness and wear resistance. In the case of stainless steels hardening by thermochemical treat ment has been considered bad practice or a compromise between corrosion proper. With a diameter that s held to a close tolerance this material is hardened for increased wear and abrasion resistance. It is magnetic in both the annealed and hardened conditions.

Ak steel type 440a is a high carbon martensitic stainless steel developed to provide stainless properties with maximum hardness. 440c can be oil quenched to achieve maximum hardness. 440c is a high carbon straight chromium high hardenability martensitic stainless steel generally supplied in the annealed condition with a maximum brinell hardness of 269 rc29 or annealed and cold drawn with a maximum brinell hardness of 285 rc31 characterised by good corrosion resistance in mild domestic and industrial environments including fresh water organic materials mild acids. Northlake will custom manufacture to your hardness and case depth specifications.

Ball and roller bearings. Grade 440c is capable of attaining after heat treatment the highest strength hardness and wear resistance of all the stainless alloys. Tight tolerance hardened 440c stainless steel. It has one of the highest attainable hardnesses of the corrosion and heat resisting grades.

For those applications where superior machinability is desired and where slightly lower corrosion resistance is satisfactory 440c can be supplied. Grade 440c stainless steel is a high carbon martensitic stainless steel. Stainless steel is associated with a loss of corrosion resistance as nitrogen and car bon react with chromium to form carbides nitrides thus withdrawing chromium from solid solution. It is usually heat treated to reach hardness of 58 60 hrc it is a bearing steel and used in rolling contact stainless bearings e g.

60 65 rc hardness in carbon product and 50 55 rc in 440c stainless steel. This grade is magnetic at all times. Maximum hardness and corrosion resistance are available only in the hardened or hardened and stress. Northlake s state of the art induction hardening lines produce uniform case depths and consistent hardness end to end.

It is also used to make knife blades. Consequently a high car bon potential may be suitable for short carbur izing times but not for prolonged carburizing. Selection of carbon potential also depends on the carburizing response of a particular steel. 440c is a hardenable chromium steel.