Duplex Steel Alloy 329 Structural Profiles Overview
Zeon Exports supplies Duplex Steel Alloy 329 (UNS S32900) structural profiles — angles, channels and beams — one of the earliest duplex stainless grades, with a chloride-resistant, high-strength composition for pulp & paper and marine structural fabrication.
Duplex Steel Alloy 329 Structural Profiles form load-bearing frames and supports in pulp & paper, chemical processing and marine structures. As one of the original duplex grades, its chromium-nickel-molybdenum composition gives strong general and pitting corrosion resistance along with high strength and toughness, without requiring post-weld heat treatment.
- Yield ≥450 MPa, roughly double that of austenitic 304/316
- Excellent resistance to pitting, crevice and stress corrosion cracking
- EN 10204 3.1 certified, export-ready worldwide
Quick Specifications of Duplex Steel Alloy 329 Structural Profiles
Duplex Steel Alloy 329 Structural Profiles are produced to internationally recognized specifications.
| Field | Detail |
|---|---|
| Material/Grade | Duplex Steel Alloy 329 |
| UNS | S32900 |
| Werkstoff Number | 1.4460 |
| Standards | ASTM A276, ASTM A479 |
| Form | Angles, Channels, Beams |
| Finish | Hot rolled, ground |
| Heat Treatment | Solution Annealed |
| Certification | EN 10204 3.1 |
Equivalent Grades of Alloy 329
Alloy 329 is recognized under several international designations below.
| UNS | Werkstoff Number | EN Steel Name | Common Trade Name | ASTM/ASME Standard |
|---|---|---|---|---|
| S32900 | 1.4460 | X3CrNiMoN27-5-2 | Type 329 | ASTM A276/A479 |
Chemical Composition of Alloy 329
Composition per ASTM A276/A479 for UNS S32900; exact limits can vary slightly by specification and heat.
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 23.0 – 28.0 |
| Nickel (Ni) | 2.50 – 5.00 |
| Molybdenum (Mo) | 1.00 – 2.00 |
| Manganese (Mn), max | 1.00 |
| Silicon (Si), max | 0.75 |
| Carbon (C), max | 0.08 |
| Iron (Fe) | Balance |
Physical Properties of Duplex Steel Alloy 329
Physical properties for Alloy 329, confirmed against manufacturer data.
| Property | Value |
|---|---|
| Density | ~7.80 g/cm3 (typical) |
| Melting Range | Confirm against applicable datasheet |
| Magnetic Behaviour | Magnetic (ferrite phase present) |
Mechanical Properties of Duplex Steel Alloy 329 Structural Profiles
Minimum mechanical properties for annealed UNS S32900 per ASTM A276/A479.
| Property | Value |
|---|---|
| Tensile Strength | 620 – 880 MPa |
| Yield Strength (0.2% offset), min | 450 MPa |
| Condition | Solution Annealed |
Corrosion Resistance of Duplex Steel Alloy 329
- Duplex Steel Alloy 329 Structural Profiles carry very good resistance to localized corrosion in chloride-bearing environments.
- Pitting resistance: high resistance to chloride-induced pitting in acidic and alkaline solutions.
- Crevice resistance: performs well at bolted and welded structural joints in chloride environments.
- Chloride SCC resistance: resists stress corrosion cracking that limits austenitic 304/316 sections in hot chloride service.
Heat Resistance of Duplex Steel Alloy 329
Duplex Steel Alloy 329 structural profiles exhibit brittleness when exposed to temperatures between roughly 300°C and 900°C, and the ASME Boiler and Pressure Vessel Code restricts continuous use to below 260°C (500°F) to avoid embrittlement risk. Confirm exact service limits against the governing standard and application before specifying.
Key Properties of Duplex Steel Alloy 329 Structural Profiles
Beyond corrosion and heat performance, Alloy 329 structural profiles offer these additional properties.
- Good machinability from optimized sulfur content and inclusion morphology
- No post-weld heat treatment typically required
- High strength and toughness compared to austenitic grades
- Long field history in pulp & paper and marine applications
Benefits of Duplex Steel Alloy 329 Structural Profiles
Choosing Alloy 329 structural profiles from Zeon Exports delivers measurable advantages for your project.
- Proven, well-documented duplex grade with a long service record
- 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
Explore related Duplex Steel products from Zeon Exports.
Request a Quote for Duplex Steel Alloy 329 Structural Profiles
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Call: +91 98205 33105
Email: info@zeonexports.com
Website: www.zeonexports.com
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Frequently Asked Questions About Duplex Steel Alloy 329 Structural Profiles
Common questions about Duplex Steel Alloy 329 Structural Profiles, answered below.
Q1: What is Duplex Steel Alloy 329?
Ans. Alloy 329 (UNS S32900) is one of the earliest duplex stainless steels, with a chromium-nickel-molybdenum composition.
Q2: Which profile shapes are available in Alloy 329?
Ans. We supply angles, channels and beams across standard structural sizes.
Q3: What is the maximum service temperature?
Ans. The ASME B&PV Code restricts continuous use of S32900 to below 260°C (500°F) to avoid embrittlement risk.
Q4: Is Alloy 329 magnetic?
Ans. Yes, like other duplex grades, Alloy 329 is magnetic due to its ferrite phase content.
Q5: Is Alloy 329 suitable for chemical processing?
Ans. Yes, Alloy 329 has a long history of use in pulp & paper and chemical processing structures for its acid resistance.
Q6: What certification is provided with orders?
Ans. Every order ships with EN 10204 3.1 mill test certificates confirming grade, heat and dimensions.
Q7: 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.
Q8: What standards apply to Alloy 329 profiles?
Ans. Profiles are manufactured to ASTM A276/A479, certified to EN 10204 3.1 mill test certificates.
