Duplex Steel Alloy 2205 Structural Profiles Overview
Duplex Steel Alloy 2205 Structural Profiles form load-bearing frames and supports in structures exposed to chlorides, seawater and process chemicals, where austenitic sections corrode faster. The dual ferritic-austenitic structure gives these profiles higher strength and pitting resistance than 304/316L. Engineers specify them for offshore platforms, walkways and marine structural fabrication needing long service life with lighter sections.
Quick Specifications of Duplex Steel Alloy 2205 Structural Profiles
Duplex Steel Alloy 2205 Structural Profiles are produced to internationally recognized structural specifications.
| Field | Detail |
|---|---|
| Material/Grade | Duplex Steel Alloy 2205 |
| UNS | S31803 / S32205 |
| Werkstoff Number | 1.4462 |
| Standards | ASTM A276, ASTM A484, EN 10088-3 |
| Form | Angles, Channels, Beams |
| Finish | Hot rolled, ground |
| Heat Treatment | Solution Annealed |
| Certification | EN 10204 3.1 |
Equivalent Grades of Alloy 2205
Alloy 2205 structural profiles correspond to equivalent duplex designations across standards bodies and regional naming systems.
| UNS | Werkstoff Number | EN Steel Name | Common Trade Name | ASTM/ASME Standard |
|---|---|---|---|---|
| S31803 | 1.4462 | X2CrNiMoN22-5-3 | Duplex 2205 | ASTM A276/A484 |
| S32205 | 1.4462 | X2CrNiMoN22-5-3 | Duplex 2205 (restricted) | ASTM A276/A484 |
Chemical Composition of Alloy 2205
Chemical composition follows ASTM A276/A484 limits for UNS S31803/S32205; exact ranges can vary by specification and heat.
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 21.0 – 23.0 |
| Nickel (Ni) | 4.5 – 6.5 |
| Molybdenum (Mo) | 2.5 – 3.5 |
| Nitrogen (N) | 0.14 – 0.20 |
| Manganese, Silicon, Iron | Balance |
Physical Properties of Duplex Steel Alloy 2205
Alloy 2205 structural profiles share the physical properties of duplex 2205 base material, summarized below.
| Property | Value |
|---|---|
| Density | ~7.80 g/cm3 |
| Melting Range | ~1420–1460°C |
| Magnetic Behaviour | Magnetic |
Mechanical Properties of Duplex Steel Alloy 2205 Structural Profiles
Mechanical properties below reflect standard solution-annealed condition minimums for Alloy 2205 structural profiles.
| Property | Minimum Value |
|---|---|
| Tensile Strength | 620 MPa |
| Yield Strength | 450 MPa |
| Elongation | 25% |
| Condition | Solution Annealed |
Corrosion Resistance of Duplex Steel Alloy 2205
- With a PREN of 34–38, Duplex Steel Alloy 2205 Structural Profiles resist localized attack far better than 316L.
- Pitting resistance: high resistance to chloride-induced pitting in seawater and brine service.
- Crevice resistance: performs reliably at bolted and welded joints where crevice corrosion typically starts.
- Chloride SCC resistance: resists stress corrosion cracking that limits austenitic sections in hot chloride environments, extending service life in offshore and marine structures.
Heat Resistance of Duplex Steel Alloy 2205
Alloy 2205 structural profiles are generally suited to continuous service across a moderate temperature range typical of duplex grades; industry guidance commonly limits continuous use to roughly 300°C to avoid embrittlement risk. Always confirm exact service limits against the governing standard and application before specifying.
⚠️ Flag: the 300°C figure is a general duplex-family guideline, not verified against a structural-specific spec – confirm against the applicable design code before publishing.
Key Properties of Duplex Steel Alloy 2205 Structural Profiles
Beyond corrosion and heat performance, Alloy 2205 structural profiles offer these additional properties.
- High mechanical strength allows lighter structural sections
- Good weldability using ER2209/E2209 filler metals
- Machinable and cuttable with standard structural tooling
- Good impact toughness down to low sub-zero temperatures
Benefits of Duplex Steel Alloy 2205 Structural Profiles
Choosing Alloy 2205 structural profiles from Zeon Exports delivers measurable advantages for your project.
- Lower long-term maintenance from superior corrosion resistance
- Full MTC 3.1 documentation for project QA/QC requirements
- Multiple profile shapes and sizes to match exact project specs
- Reliable bulk supply with consistent ready stock
- Competitive export pricing for large industrial orders
- Fast dispatch to global project sites and ports
Related Products
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Frequently Asked Questions About Duplex Steel Alloy 2205 Structural Profiles
Common questions about Duplex Steel Alloy 2205 Structural Profiles, answered below.
Q1: What is Duplex Steel Alloy 2205?
Ans. Alloy 2205 (UNS S31803/S32205) is a duplex stainless steel with balanced ferritic-austenitic structure, giving high strength and strong chloride pitting resistance.
Q2: Which profile shapes are available in Alloy 2205?
Ans. We supply angles, channels and beams to ASTM A276/A484 across standard structural sizes.
Q3: What standards do Alloy 2205 profiles meet?
Ans. Profiles are manufactured to ASTM A276/A484, certified to EN 10204 3.1 mill test certificates.
Q4: How does Alloy 2205 compare to 316L structural sections?
Ans. Alloy 2205 offers roughly double the yield strength and significantly better pitting and crevice resistance than 316L.
Q5: What is the PREN value of Alloy 2205 profiles?
Ans. Alloy 2205 has a PREN of approximately 34–38, indicating strong resistance to pitting and crevice corrosion.
Q6: Can Alloy 2205 profiles be used offshore?
Ans. Yes, Alloy 2205 profiles are widely used in offshore platforms and marine structures for their chloride resistance.
Q7: What certification is provided with orders?
Ans. Every order ships with EN 10204 3.1 mill test certificates confirming grade, heat and dimensions.
Q8: Does Zeon Exports supply custom profile sizes?
Ans. Yes, profiles are available cut-to-size and in custom dimensions on request for bulk industrial orders.
