Comparison
316 vs 316L
316 and 316L are both austenitic acid-resistant stainless with molybdenum. The difference is the maximum carbon. 316L (1.4404) is the low-carbon variant typically chosen for welded structures. 316 (1.4401) has a higher carbon ceiling.
The short difference
L stands for low carbon. Lower carbon reduces the risk of intergranular corrosion in the heat-affected zone after welding. For welded vessels and pipework, 316L is often the standard choice unless the drawing requires otherwise.
- 316 – 1.4401 – higher carbon ceiling
- 316L – 1.4404 – low carbon, typically for welding
- 316Ti (1.4571) – stabilised alternative when Ti is specified
What to order
Write 316, 316L, 1.4401 or 1.4404 exactly as the drawing does. Add form (plate, bar, tube), dimension and certificate. We do not drop the L without agreement.
Frequently asked questions
- Can I use 316 instead of 316L?
- Only if the drawing and the corrosion requirement allow it. For welded parts, 316L is most often the safe choice. Substitution must be agreed.
Read more
Send your enquiry
State grade, dimensions and quantity — or attach a drawing. We reply with a quote.