Super Duplex 2507 vs Duplex 2205: Same duplex family — 2507 for more aggressive environments
Super Duplex 2507 vs Duplex 2205
Side-by-side chemical composition and mechanical property comparison.
Overview
Super Duplex 2507
1.4410
Super duplex stainless steel with PREN >40. Superior corrosion resistance to standard 2205 duplex, especially in chloride and H₂S environments. Used for subsea pipelines, offshore platform components, desalination plants, and chemical processing 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.
| Super Duplex 2507 | Duplex 2205 | |
|---|---|---|
| Material Number | 1.4410 | 1.4462 |
| Category | Stainless Steel | Stainless Steel |
| Standard | EN 10088-2 | EN 10088-2 |
Chemical composition (wt%)
| Element | Super Duplex 2507 | Duplex 2205 | Overlap |
|---|---|---|---|
| C | 0–0.03% | 0–0.03% | OK |
| Si | 0–0.8% | 0–1% | OK |
| Mn | 0–1.2% | 0–2% | OK |
| P | 0–0.035% | 0–0.035% | OK |
Mechanical properties
| Property | Super Duplex 2507 | Duplex 2205 | Unit |
|---|---|---|---|
| tensile_strength | 730–930 | 650–880 | MPa |
| yield_strength | ≥ 530 | ≥ 450 | MPa |
| elongation | ≥ 20 | ≥ 25 | % |
Compatibility Assessment
2507 has higher Cr (25 vs 22%), Mo (3-5 vs 2.5-3.5%), N (0.24-0.32 vs 0.10-0.22%) giving PREN >40 vs ~35. 2507 has higher yield (530 vs 450 MPa). Choose 2205 unless chloride/H₂S environment demands super duplex.
Frequently Asked Questions
Is Super Duplex 2507 the same as Duplex 2205?
Super Duplex 2507 and Duplex 2205 have a 65% composition overlap. Same duplex family — 2507 for more aggressive environments
Can I replace Super Duplex 2507 with Duplex 2205?
Generally not recommended. The compositions differ significantly (65% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between Super Duplex 2507 and Duplex 2205?
The main differences are in the following elements: Cr, Mo, Ni, N. Super Duplex 2507 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.
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