Stainless steel 300 series: comparing 304, 316 and 316L

The stainless steel 300 series includes common 304, 316, and 316L, which differ in composition and performance. 304 stainless steel contains 18% chromium and 8% nickel, suitable for general environments, and has good corrosion resistance. 316 stainless steel has 2% more molybdenum than 304, which improves its corrosion resistance, especially in chloride environments, making it suitable for the marine and chemical industries. 316L stainless steel, on the other hand, has a lower carbon content and is less prone to carbide formation, making it more excellent in high-temperature corrosive environments.

304 stainless steel is mainly used in fields such as construction and kitchen equipment that require general corrosion resistance. 316 stainless steel is suitable for applications that require higher corrosion resistance, such as chemical equipment and marine engineering. 316L, due to its low carbon content, is suitable for use in high-temperature and corrosive media, such as in the pharmaceutical and food processing industries.

316 and 316L stainless steel have higher corrosion resistance and tensile strength compared to 304, making them suitable for applications that require higher strength, such as the aerospace industry. However, the cost is also relatively high, and the choice needs to be balanced according to specific needs.

Overall, the choice of 304, 316, or 316L stainless steel depends on the specific usage environment, requirements for corrosion resistance, strength, and cost. Taking into account material characteristics and budget, the most suitable choice can be made to meet actual needs.