316L vs Duplex 2205: Different steel families — duplex vs austenitic
316L vs Duplex 2205
Side-by-side chemical composition and mechanical property comparison.
Overview
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.
Duplex 2205
1.4462
The most widely used duplex (austenitic-ferritic) stainless steel. Balanced 50/50 microstructure provides twice the yield strength of 304/316L with superior chloride and stress corrosion resistance. Used in oil & gas, chemical processing, marine, and pulp & paper industries.
| 316L | Duplex 2205 | |
|---|---|---|
| Material Number | 1.4404 | 1.4462 |
| Category | Stainless Steel | Stainless Steel |
| Standard | EN 10088-2 | EN 10088-2 |
Chemical composition (wt%)
| Element | 316L | Duplex 2205 | 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% | 0–0.035% | OK |
Mechanical properties
| Property | 316L | Duplex 2205 | Unit |
|---|---|---|---|
| tensile_strength | 520–680 | 650–880 | MPa |
| yield_strength | ≥ 220 | ≥ 450 | MPa |
| elongation | ≥ 40 | ≥ 25 | % |
Compatibility Assessment
Duplex 2205 has roughly double the yield strength (450 vs 220 MPa) and superior chloride resistance due to higher Cr/Mo/N content. 316L is easier to fabricate and available in more product forms. Choose 2205 for demanding environments.
Frequently Asked Questions
Is 316L the same as Duplex 2205?
316L and Duplex 2205 have a 40% composition overlap. Different steel families — duplex vs austenitic
Can I replace 316L with Duplex 2205?
Generally not recommended. The compositions differ significantly (40% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 316L and Duplex 2205?
The main differences are in the following elements: Cr, Mo, Ni, N. 316L is a Stainless Steel grade, while Duplex 2205 is a Stainless Steel grade.
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Data provided for reference only. Always verify against the applicable specification for critical applications.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.