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.
2. Technical Specifications
| 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) |
3. Competitive Advantages
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.
4. Next-Gen Saltwater Applications
- Blue Hydrogen Hubs: Structural frames for seawater electrolyzers and hydrogen storage
units in coastal zones.
- Deep-Sea Mining ROVs: Pressure-resistant bars for robotic arms and sensor mounts in
brine pools.
- Floating Desalination Barges: Pump shafts and brine concentrator components for mobile water
treatment.
- Arctic Offshore Drilling: Cryogenic-tolerant fasteners and pipeline supports resistant to
ice abrasion.
- Bio-Glass Reefs: Marine restoration structures with anti-corrosion bars to anchor
artificial coral ecosystems.
- Tidal Turbine Arrays: Rotor shafts and mooring systems enduring 24/7 seawater immersion
and microbe attacks.
- Zero-Discharge Aquaculture: Cage frames and feed systems for offshore fish farms with
circular water flows.
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.
