X2CrNiMoN17-13-3 vs 316L: 316LN vs 316L — nitrogen boosts yield strength + PREN
X2CrNiMoN17-13-3 vs 316L
Side-by-side chemical composition and mechanical property comparison.
Overview
X2CrNiMoN17-13-3
1.4429
Low-carbon nitrogen-enhanced austenitic Cr-Ni-Mo steel — AISI 316LN. Nitrogen (0.12-0.22%) boosts yield strength above 316L while maintaining weldability. Higher PREN than 316L for better pitting resistance. Charpy impact compliant to -196°C. ASME Section III approved for nuclear pressure boundary. Used for nuclear power piping, LNG cryogenic vessels, pharmaceutical equipment, and chemical plants.
316L
1.4404
Low-carbon austenitic stainless steel with molybdenum addition. Superior corrosion resistance to 304, especially against chlorides and pitting. Standard choice for chemical processing, marine, medical implants, and pharmaceutical equipment.
| X2CrNiMoN17-13-3 | 316L | |
|---|---|---|
| Material Number | 1.4429 | 1.4404 |
| Category | Stainless Steel | Stainless Steel |
| Standard | EN 10088-3 | EN 10088-2 |
Chemical composition (wt%)
| Element | X2CrNiMoN17-13-3 | 316L | Overlap |
|---|---|---|---|
| C | 0–0.03% | 0–0.03% | OK |
| Si | 0–1% | 0–1% | OK |
| Mn | 0–2% | 0–2% | OK |
| P | 0–0.045% | 0–0.045% | OK |
Mechanical properties
| Property | X2CrNiMoN17-13-3 | 316L | Unit |
|---|---|---|---|
| tensile_strength | 550–700 | 520–680 | MPa |
| yield_strength | ≥ 270 | ≥ 220 | MPa |
| elongation | ≥ 40 | ≥ 40 | % |
Compatibility Assessment
1.4429 (316LN) has 0.12-0.22% N raising yield strength from ~200 to ~270 MPa min, plus higher Mo (2.5-3 vs 2-2.5%) and PREN. Required for ASME Section III nuclear code and cryogenic service. More expensive (AOD/VOD melting for N control). Choose 1.4429 for nuclear/cryogenic; 1.4404 for general chemical service.
Frequently Asked Questions
Is X2CrNiMoN17-13-3 the same as 316L?
X2CrNiMoN17-13-3 and 316L have a 80% composition overlap. 316LN vs 316L — nitrogen boosts yield strength + PREN
Can I replace X2CrNiMoN17-13-3 with 316L?
In many cases, yes. The compositions overlap significantly (80%). However, always verify mechanical property requirements and heat treatment compatibility for your specific application.
What is the difference between X2CrNiMoN17-13-3 and 316L?
The main differences are in the following elements: Mo, Ni, N. X2CrNiMoN17-13-3 is a Stainless Steel grade, while 316L is a Stainless Steel grade.
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Data provided for reference only. Always verify against the applicable specification for critical applications.
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