What is the hardness of 420 stainless steel plate?
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420 stainless steel is a martensitic stainless steel with high hardness and wear resistance. Its chemical composition usually contains about 12% to 14% chromium, and may also contain trace amounts of carbon, manganese, silicon, phosphorus and sulfur. Due to its chromium content, 420 stainless steel has relatively good corrosion resistance, but its corrosion resistance is lacking compared to austenitic stainless steel.
In terms of hardness, after heat treatment, the hardness of 420 stainless steel can reach HRC 50 to 58, so it is widely used in knives, medical equipment, scissors and other occasions that require high hardness and wear resistance.
The improvement in its hardness is mainly due to the phase transformation of martensite and the control of cooling rate. In actual use, the hardness of 420 stainless steel makes it excel in the following aspects: first, it can withstand greater wear, and second, it can maintain its sharpness for a longer time.
2. What is the difference between 420 and 430 stainless steel?
1. Different performance: 420 stainless steel has certain wear resistance and corrosion resistance, higher hardness, but slightly poor corrosion resistance. 430 stainless steel has oxidation resistance, corrosion resistance, safety and non-toxicity, poor mechanical and process performance.
Different types: 420 belongs to martensitic stainless steel. 430 stainless steel belongs to ferritic stainless steel.
2. Different performance: 420 stainless steel has certain wear resistance and corrosion resistance, higher hardness, but slightly poor corrosion resistance. 430 stainless steel has oxidation resistance, corrosion resistance, safety and non-toxicity, poor mechanical and process performance.
3. Both 420 and 430 stainless steel belong to chromium stainless steel, mainly used to manufacture knives, pressure vessels, etc. Although both stainless steels have the advantages of stainless, corrosion resistance, and heat resistance, their application fields are also different due to their different compositions. Composition comparison 420 stainless steel has a high carbon content, between 15% and 40%, with high hardness and good strength.
