What is the hardness of 440A stainless steel plate

440 stainless steel is a heat-treatable and strengthened stainless steel. After heat treatment, the hardness can reach about HRC50. The highest hardness. Used for nozzles and bearings. 440F: It is a steel type that improves the easy-cutting performance of 440C steel.

1. Heat treatment of 440A stainless steel: ① Hardness HBW≤: annealing 255, hardness HRB≤: quenching and tempering 54HRC, ② Heating temperature: 800~920, ③ Heating method: slow cooling.

2. 440A stainless steel: 925-1200℃ 440B: 925-1175℃ 440℃: 925-1150℃ Hardening 440 stainless steel can be quenched and tempered like alloy steel. Machinability 440 steel, especially 440C steel, is difficult to process due to its high annealing hardness and abrasive chromium carbide.

3. The hardness of 440A/B on knives is usually 55-57HRC, and the hardness of 440C is 58HRC. These three types of 440 stainless steel have covered the average hardness range of the entire knife steel, from table knives to sturdy tool knives.

4. 440B stainless steel has higher hardness and toughness than 440A steel. 440B stainless steel is used for cutting tools, measuring tools, bearings, and valves. Suitable for bayonet blade materials.

5. Advantages of 440A stainless steel: It has good rust resistance and is suitable for diving knives. The hardness is about 56 due to the influence of carbon content, which is just right for daily use.