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420 stainless steel is a high-carbon stainless steel, mainly composed of chromium, carbon and molybdenum, with good corrosion resistance and strength.
439 stainless steel is a ferritic stainless steel with 17-20% of chromium and low carbon content. This combination gives it excellent corrosion resistance, especially in environments where chloride ions are present.
440C stainless steel is a high carbon martensitic stainless steel that has high strength, moderate corrosion resistance, and good hardness and wear resistance. Grade 440C is capable of attaining, the highest strength, hardness and wear resistance of all the stainless alloys after heat treatment.
444 stainless steel is mostly popular for its brilliant corrosion resistance and heat resistance just like many other stainless steels. This stainless steel has a wide range of applications and can maintain stable performance in a variety of extreme environments.
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