Mechanical properties: In terms of fatigue strength, 201 stainless steel has greater hardness, toughness, and fatigue resistance than 304 stainless steel.

There are certain differences between 304 and 304L in terms of composition, performance and use. Especially in terms of carbon content, 304L is an ultra-low carbon stainless steel with a carbon content reduced to less than 0.03%. On the basis of improving the corrosion resistance of stainless steel, it can also improve the corrosion resistance of 304 caused by the precipitation of chromium carbide between 450 and 860°C. Intergranular corrosion caused by sensitization and welding, and 304L has better welding performance. Of course, the price of 304L is also relatively high; but it is worth noting that neither 304 nor 304L is resistant to corrosion by media containing chloride ions. It needs to be selected according to the specific usage scenario.

Stainless steel dry goods, don’t be confused anymore 201, 202, 301, 302, 304

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2507 duplex stainless steel is a high-strength, high-corrosion-resistant material that is widely used in marine industry, chemical industry, energy and other fields. However, during use, due to long-term exposure to mechanical stress and environmental atmosphere, cracks in stainless steel will gradually expand and seriously affect the performance of the material. Therefore, the study of crack behavior and exploration of the oxidation mechanism of cracks are crucial to improving the corrosion resistance of materials and extending their service life.

F55 duplex stainless steel material properties