303 vs Duplex 2205: 42% composition overlap. Significantly different materials serving different application areas.
303 vs Duplex 2205
Side-by-side chemical composition and mechanical property comparison.
Overview
303
1.4305
Free-machining austenitic stainless steel — the most machinable of all austenitic grades. 0.15-0.35% S (as MnS inclusions) provides excellent chip-breaking. Trade-off: lower corrosion resistance than 304, poor weldability (hot cracking risk), and not suitable for cold forming. Used for high-volume automatic lathe parts: fittings, valves, screws, shafts, and precision components.
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.
| 303 | Duplex 2205 | |
|---|---|---|
| Material Number | 1.4305 | 1.4462 |
| Category | Stainless Steel | Stainless Steel |
| Standard | EN 10088-3 | EN 10088-2 |
Chemical composition (wt%)
| Element | 303 | Duplex 2205 | Overlap |
|---|---|---|---|
| C | 0–0.1% | 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 | 303 | Duplex 2205 | Unit |
|---|---|---|---|
| tensile_strength | 500–750 | 650–880 | MPa |
| yield_strength | ≥ 190 | ≥ 450 | MPa |
| elongation | ≥ 35 | ≥ 25 | % |
Compatibility Assessment
303 and Duplex 2205 have significantly different compositions (42% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 303 the same as Duplex 2205?
303 and Duplex 2205 have a 42% composition overlap. They are generally not directly interchangeable.
Can I replace 303 with Duplex 2205?
Generally not recommended. The compositions differ significantly (42% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 303 and Duplex 2205?
The main differences are in the following elements: S, Cr, Ni. 303 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.