JIANGSU CHINA STEEL UNION INDUSTRIAL CO.,LTD.
江苏中钢联合实业有限公司
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Corrosion Proof 2205 Duplex Stainless Steel Bar - 3/4" Square, Saltwater Application
2205 duplex stainless steel bar (3/4" square) redefines durability in hyper-corrosive saltwater environments. Merging austenitic and ferritic microstructures, this dual-phase alloy delivers twice the yield strength of conventional 316 stainless steel while excelling in chloride-rich settings like offshore platforms, desalination plants, and subsea pipelines. Engineered to resist pitting, crevice corrosion, and stress corrosion cracking (SCC), it thrives in seawater temperatures up to 80°C. The square profile enhances load distribution and welding efficiency, making it ideal for modular marine infrastructure and next-gen blue energy systems.
| Parameter | Details |
|---|---|
| Material | 2205 Duplex Stainless Steel (UNS S32205/S31803) |
| Element Composition | Cr: 22–23%, Ni: 4.5–6.5%, Mo: 3–3.5%, N: 0.14–0.2%, Mn: ≤2%, Fe: Balance |
| Standard | ASTM A276, EN 10088-1, NORSOK MDS D45 |
| Dimensions | 3/4" square (±0.07mm tolerance), custom lengths up to 12m |
| Surface Treatment | Pickled, passivated, or anti-biofouling coating (optional) |
| Mechanical Properties | Tensile Strength: ≥795 MPa, Yield Strength: ≥550 MPa, Hardness: ≤310 HV |
| Corrosion Resistance | PREN ≥34, ISO 15156-3 (NACE MR0175) compliant for sour service |
| Certifications | DNV-GL, ABS, ISO 20904 (sustainable sourcing) |
| Eco-Innovation | 30% Recycled Content, Low-Carbon Production (≤1.8t CO₂/ton) |
① Dual-Phase Defense
Austenitic-ferritic microstructure blocks chloride ion penetration, outperforming single-phase alloys in splash zones and tidal environments.
② Biofouling Resistance
Optional graphene-infused coatings inhibit marine organism adhesion, reducing maintenance for offshore wind turbine foundations.
③ Zero SCC Risk
Nitrogen-enhanced matrix prevents stress corrosion cracking in high-pressure, high-salinity subsea pipelines.
④ Green Credentials
Low-carbon production aligns with EU Taxonomy and offshore decarbonization mandates.
⑤ Smart Integration
Embedded RFID tags (on request) enable real-time corrosion monitoring via IoT-enabled asset management systems.
⑥ Modular Fabrication
Precision square bars simplify assembly in floating solar farms, hydrogen electrolysis platforms, and wave energy converters.
Why This Product?
Beyond traditional marine engineering, the 2205 duplex bar bridges material innovation and climate resilience. Its unmatched saltwater durability, IoT-ready features, and eco-design make it pivotal for sustainable ocean economies, where corrosion is not just a challenge—it’s an existential threat.
FAQ
Q: Why choose us?
A: Our company have been in steel business for more than ten years, we are internationally experienced, professional, and we can provide variety of steel products with high quality to our clients.
Q: Can provide OEM/ODM service?
A: Yes. Please feel free to contact us for more details discuss.
Q: How is your Payment Term?
A:One is 30% deposit by TT before production and 70% balance against copy of B/L; the other is Irrevocable L/C 100% at sight.
Q: Can we visit your factory?
A: Warmly welcome. Once we have your schedule, we will arrange the professional sales team to follow up your case.
Q: Can you provide sample?
A: Yes, for regular sizes sample is free but buyer need to pay freight cost.
Q: How long is your delivery time?
A: Our daily inventory is more than 8000 tons, so for common product size, just need 3 days from stocks; if the special size from new production, delivery 15-20 days.