17-4PH vs Duplex 2205: 50% composition overlap. Moderate differences, generally not direct substitutes.
17-4PH vs Duplex 2205
Side-by-side chemical composition and mechanical property comparison.
Overview
17-4PH
1.4542
The most widely used precipitation-hardening stainless steel. Combines high strength (up to 1310 MPa UTS) with corrosion resistance comparable to 304. Delivered solution-annealed and hardened by simple low-temperature aging. Used in aerospace, medical, oil & gas, and nuclear applications.
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.
| 17-4PH | Duplex 2205 | |
|---|---|---|
| Material Number | 1.4542 | 1.4462 |
| Category | Stainless Steel | Stainless Steel |
| Standard | EN 10088-3 | EN 10088-2 |
Chemical composition (wt%)
| Element | 17-4PH | Duplex 2205 | Overlap |
|---|---|---|---|
| C | 0–0.07% | 0–0.03% | OK |
| Si | 0–0.7% | 0–1% | OK |
| Mn | 0–1.5% | 0–2% | OK |
| P | 0–0.04% | 0–0.035% | OK |
Mechanical properties
| Property | 17-4PH | Duplex 2205 | Unit |
|---|---|---|---|
| tensile_strength | ≥ 1310 | 650–880 | MPa |
| yield_strength | ≥ 1170 | ≥ 450 | MPa |
| elongation | ≥ 10 | ≥ 25 | % |
Compatibility Assessment
17-4PH and Duplex 2205 have moderate differences (50% overlap). They are generally not direct substitutes. Consider the specific requirements of your application.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 17-4PH the same as Duplex 2205?
17-4PH and Duplex 2205 have a 50% composition overlap. They are generally not directly interchangeable.
Can I replace 17-4PH with Duplex 2205?
Generally not recommended. The compositions differ significantly (50% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 17-4PH and Duplex 2205?
The main differences are in the following elements: Cr, Ni. 17-4PH 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.