Case Hardening 440c Stainless Steel

Ak steel type 440a is a high carbon martensitic stainless steel developed to provide stainless properties with maximum hardness.

Case hardening 440c stainless steel.

Consequently a high car bon potential may be suitable for short carbur izing times but not for prolonged carburizing. Grade 440c stainless steel is a high carbon martensitic stainless steel. Northlake will custom manufacture to your hardness and case depth specifications. 440c uns designation s44004 is a martensitic 400 series stainless steel and is the highest carbon content from 400 stainless steel series.

It has one of the highest attainable hardnesses of the corrosion and heat resisting grades. Northlake s state of the art induction hardening lines produce uniform case depths and consistent hardness end to end. Selection of carbon potential also depends on the carburizing response of a particular steel. Tight tolerance hardened 440c stainless steel.

Ball and roller bearings. Maximum hardness and corrosion resistance are available only in the hardened or hardened and stress. 60 65 rc hardness in carbon product and 50 55 rc in 440c stainless steel. 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.

It has high strength moderate corrosion resistance and good hardness and wear resistance. 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 also used to make knife blades. Grade 440c is capable of attaining after heat treatment the highest strength hardness and wear resistance of all the stainless alloys.

Tight tolerance bearing quality 440c stainless steel with certification. 440c can be oil quenched to achieve maximum hardness. 440c is a hardenable chromium steel. It is magnetic in both the annealed and hardened conditions.

Standard stock grades include 1060 carbon and 440c stainless. 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. For those applications where superior machinability is desired and where slightly lower corrosion resistance is satisfactory 440c can be supplied.