EN 1.4125 / AISI 440C (UNS S44004) is a high carbon martensitic stainless steel with high hardness, wear resistance and good edge retention, due to higher carbon content at the expense of corrosion resistance. Good corrosion resistance can be achieved in hardened and tempered condition. Widely used in applications where high hardness and resistance are required together with good corrosion resistance.
Material may also be supplied against customer specifications, subject to enquiry.
Chemical Composition, %
AISI 440 C has moderate corrosion resistance, which can be achieved in hardened and tempered conditions. The corrosion resistant is suitable in mild domestic and industrial environments such as fresh water, atmosphere, foods, mild acids and alkalis. In annealed condition, it can be machined well like high-speed steel due to the high carbon content, but after being heat treated, machining become extremely difficult in the hardened condition. AISI 440C is not usually welded because it can easily air hardened due too its high hardness characteristic.
Weldability: very poor
Machinability: 4 (1 = poor – 10 = good)
Corrosion class: 2 (0 = poor – 5 = good)
We supply a range of flat bars and round bars, on both stock and indent basis.
Primarily manufactured in: Europe, US