1, chemical composition. Martensitic stainless steel has a higher carbon content, usually between 0.1% and 1.2%, while 304 stainless steel has a lower carbon content, usually below 0.08%. Common grades of martensitic stainless steel include 1Cr13, 3Cr13, etc., while 304 stainless steel contains more than 18% chromium and more than 8% nickel.
2, performance characteristics. Martensitic stainless steel has high strength and hardness, suitable for the manufacture of high-strength parts and tools, such as knives, molds and machine parts. Because of its high strength and hardness, martensitic stainless steel in the mechanical properties of the requirements of high, general corrosion resistance requirements of the occasion outstanding. In contrast, 304 stainless steel has good corrosion resistance and plasticity, suitable for the manufacture of food processing equipment, chemical containers and medical equipment, etc., its high temperature resistance up to 800 ℃, with good processing performance, high toughness.
3, application areas. Martensitic stainless steel is more widely used in chemical industry, marine engineering, high strength structures and other areas of higher requirements for material performance. And 304 stainless steel is widely used in the food industry, construction, medical equipment and other general requirements of the occasion.