Austenitic stainless
1.4439 317 LMN X2CrNiMoN17-13-5
Nitrogen-alloyed high-molybdenum austenitic (317LMN) with elevated strength and excellent resistance to chlorides and mixed acids.
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Chemical composition
mass %| Element | Content |
|---|---|
| CCarbon | ≤0.03 |
| SiSilicon | ≤1 |
| MnManganese | ≤2 |
| PPhosphorus | ≤0.04 |
| SSulphur | ≤0.015 |
| NNitrogen | 0.12–0.22 |
| CrChromium | 16.5–18.5 |
| MoMolybdenum | 4–5 |
| NiNickel | 12.5–14.5 |
Mechanical properties
room temperature- Rp0.2 min (N/mm²)
- 285
- Rp1.0 min (N/mm²)
- 315
- Rm (N/mm²)
- 580–800
- Elongation A% (longitudinal)
- 35
- Elongation A% (transverse)
- 30
- Impact energy KV J (longitudinal)
- 100
- Impact energy KV J (transverse)
- 60
Seamless tube.
Standard equivalences
- DIN/EN
- X2CrNiMoN17-13-5
- AISI
- 317LMN
Typical applications
- Crude-oil refineries
- Chemical, textile and paper industry
- Flue-gas desulphurisation
- Phosphoric acid and some mixed acids
Frequently asked questions
What is 1.4439 (317 LMN)?
1.4439 (X2CrNiMoN17-13-5) — Austenitic stainless. Nitrogen-alloyed high-molybdenum austenitic (317LMN) with elevated strength and excellent resistance to chlorides and mixed acids.
Which grades are equivalent to 1.4439?
1.4439 corresponds to EN X2CrNiMoN17-13-5; equivalent designations: AISI 317LMN.
Related grades
Indicative values — verify against the applicable standard before specifying.
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