What Is The Hardness Of 440c Stainless Steel?

There are three commonly used models: 440A, 440B, 440C, and 440F (easy to process).
What is the hardness of 440c stainless steel?
440C stainless steel is a high-carbon chromium stainless steel with a carbon content of between 95% and 20% and a chromium content of 16% to 18%. It has good corrosion resistance, hardness and wear resistance, and is a high-alloy steel among stainless steels.
AISI 400C is a high-carbon chromium steel designed to provide stainless steel characteristics with greater hardness. After heat treatment, type 440C reaches the highest hardness of all stainless steels (about 6HRC). This stainless steel is mainly used for bearing components, including ball bearings, and should be considered for needle valves and ball check valves.
440c high-strength cutting tool steel, with a slightly higher carbon content, can obtain a higher yield strength after proper heat treatment, and the hardness can reach 58HRC, which is among the harder stainless steels. A more common application example is "razor blades".

What is the appropriate hardness of 440C stainless steel after heat treatment?
4440C stainless steel is a high-carbon, high-chromium martensitic stainless steel with a carbon content of 1.0%, a chromium content of 17%, and a very low annealing temperature of 40 degrees. When used as a tool and bearing for heat treatment, the recommended hardness is HRC57-59, and if cryogenically treated, the hardness can reach HRC60.
After heat treatment, 440C stainless steel has a very high hardness, generally reaching 60-6HRC. The increase in hardness is mainly due to the phase transformation and grain refinement that occur during the heat treatment process.
440C stainless steel can be solution annealed, quenched and tempered. The solution annealing temperature is 850-900°C, the quenching temperature is 1050-1100°C, and the tempering temperature is 150-200°C. The hardness of 440C stainless steel after quenching can reach HRC58-60, with excellent wear resistance and corrosion resistance.