304L is widely used for general corrosion resistance and fabrication. 316L is often selected for chemical, marine, food and pharmaceutical duties when its improved corrosion resistance is justified.
The L suffix restricts carbon to reduce sensitisation risk in welded fabrication.
Key points
- 304L: general corrosion-resistant stainless
- 316L: contains molybdenum
- L grades support welded fabrication
- Service chemistry and temperature control selection