Stainless steel
316L / 1.4404 stainless steel
316L is an austenitic stainless steel with Werkstoffnummer 1.4404. The EN designation is X2CrNiMo17-12-2. L stands for low carbon. Molybdenum is the difference from 304. INDUSTRISTÅL supplies bar, plate and tube, saws or cuts to size and ships with 3.1. Duplex 2205 when strength and chloride resistance have to go up at the same time.
Typical applications
- Process and chemical
- Tube and fittings
- Corrosive environments with a Mo requirement
Delivery conditions
- solution annealed
Designations
- W.Nr.
- 1.4404
- EN standard
- X2CrNiMo17-12-2
- DIN
- 1.4404
- AISI/SAE
- 316L
- SS (Sweden)
- 2348
- UNS
- S31603
- JIS
- SUS316L
- Group
- Stainless steel
Chemical composition
Typical range according to EN 10088-3 (ladle analysis)
| Element | Range |
|---|---|
| C | max. 0.030 % |
| Si | max. 1.00 % |
| Mn | max. 2.00 % |
| P | max. 0.045 % |
| S | max. 0.015 % |
| Cr | 16.5–18.5 % |
| Ni | 10.0–13.0 % |
| Mo | 2.00–2.50 % |
| N | max. 0.10 % |
1.4404 / X2CrNiMo17-12-2. L is the low carbon. Mo is what separates 316L from 304.
Machinability and weldability
Yes. The L variant is chosen precisely with welding in mind.
Sawing and machining
Sawing and cutting to size. State the form – bar, plate or tube.
Certificates and documentation
EN 10204 3.1 as standard.
Dimension programme
| Form | Range | Note |
|---|---|---|
| Round bar | Ø8–200 mm | Acid-resistant round bar. |
| Flat bar | Cut to order | Stainless flat. |
| Plate | 2–50 mm thickness | Mo-bearing plate. |
| Seamless tube | Ø13.5–Ø508 mm | DN8–DN500. 316L, not 316, on new welded items. |
| Welded tube | Ø21.3–Ø610 mm | Welded 316L. State the L requirement. |
| Fittings | Ø12–Ø2000 mm | ASME 1/2–60″ (Ø15–Ø1524 mm). Type A and B. Not a stock statement. |
| Flanges | Ø14–Ø2000 mm | ASME 1/2–60″ (Ø15–Ø1524 mm). PN 6–400. Not a stock statement. |
Parts of the range are held by European partners; other dimensions can be sourced. The range is not a current stock status in every diameter — stock is confirmed on enquiry.
Frequently asked questions
- What is 316L?
- 316L / 1.4404 is an austenitic stainless steel with molybdenum and low carbon. EN X2CrNiMo17-12-2.
- Is 1.4404 the same as 316L?
- Yes. 316L is the AISI name, 1.4404 is the W.Nr.
- Can you supply 316L round bar?
- Yes. State Ø or plate thickness, length and certificate.
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Send your enquiry
State grade, dimensions and quantity — or attach a drawing. We reply with a quote.