Stainless steel 304L and 316L difference
1. Chemical composition
304L stainless steel: contains 18%-20% chromium (r) and 89%-12% nickel (Ni). "" indicates low carbon content, usually 0.039%, which improves its weldability. 316L stainless steel: similar to 304L, but with 29%-3% molybdenum (Mo) added. Molybdenum enhances its corrosion resistance, especially in chloride environments.
2. Corrosion resistance 304L: Good corrosion resistance in most atmospheres and mildly corrosive environments. 316L: The addition of molybdenum gives 316L excellent corrosion resistance, especially in chloride-rich environments, such as seawater or chemical environments.
3. Mechanical properties: The mechanical properties of the two grades are similar, but 316L may perform slightly better in some high-temperature applications.
4. Weldability: Both 304L and 316L are low-carbon versions, giving them excellent weldability.
5. Applications
304L: Commonly used in food processing, household goods, architectural decoration, medical equipment, etc. 316L: Suitable for marine, chemical processing, pharmaceutical, oil and gas and other industries that require high corrosion resistance, especially in chloride and strong acid environments.
6. Price
316L is generally more expensive than 304L because the addition of molybdenum can improve its corrosion resistance, but also increases the cost. In summary, 316L is more corrosion resistant than 304L, especially in harsh chemical or marine environments.
