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2205 Stainless Steel Plate
Our 2205 Stainless Steel Plate is made from a duplex alloy that contains chromium, nickel, and molybdenum, offering enhanced strength and resistance to corrosion compared to traditional stainless steel grades. The duplex structure—half austenitic and half ferritic—provides a combination of high strength and excellent resistance to stress corrosion cracking, making it the preferred material for industries facing extreme conditions. The 2205 Stainless Steel Plate is available in a variety of thicknesses and sizes, and it is ideal for both structural and decorative applications where high performance is essential. Whether you need a stainless steel plate for fabrication, manufacturing, or construction, 2205 Stainless Steel Plate provides the durability and reliability you require.
- Product Introduction
Neither fully austenitic nor ferritic, 2205 duplex stainless steel plates merge the best of both worlds: 304's chloride resistance meets carbon steel's structural grit. With a near 50/50 phase balance, these plates laugh off stress corrosion cracking (SCC) in chloride-rich settings while delivering 2x the yield strength of 316L. From sulfuric acid tanks to offshore rig walkways, 2205 plates are the ultimate compromise where brute force meets chemical defiance.
The Duplex Difference
Why 2205 Outperforms Single-Phase Steels:
Phase Synergy: Austenite (toughness) + ferrite (strength) = 550 MPa min yield strength.
Pitting Resistance Equivalent (PRE): 34+ (vs. 26 for 316L), thanks to 3% molybdenum and 22% chromium.
Thermal Conductivity: 15 W/m·K (30% higher than 316L), ideal for heat exchanger baffles.
Global Standards
ASTM: A240/A240M (Grade UNS S32205)
EN: 1.4462
NACE: MR0175 compliant for sour service (H₂S environments)
Application-Specific Advantages
| Industry | 2205 Plate Superpower | Competitor Weakness |
|---|---|---|
| Chemical Processing | Handles 40% sulfuric acid at 60°C | 316L fails above 20% concentration |
| Offshore Oil | Survives 15+ years in splash zones | Carbon steel requires constant coating |
| Desalination | Resists biofilm buildup in brine heaters | Titanium costs 5x more |
| Pulp & Paper | Withstands corrosive black liquor vapors | 317L plates need frequent replacement |
Fabrication Made Smarter
Cutting: Plasma or waterjet preferred; shear only for thickness <12mm.
Welding: Use 2209 filler metal, keep heat input 0.5–2.5 kJ/mm to preserve phase balance.
Post-Weld Care: No annealing required-phase ratio self-restores below 300°C.
Surface Finish: #4 brushed or 2B mill finish for optimal corrosion resistance.
Global Track Record
Norwegian Oilfield: "2205 plates in our subsea manifolds showed zero SCC after 8 years in North Sea H₂S."
Chilean Copper Mine: "Replaced 316L acid storage tanks with 2205-maintenance costs dropped 65%."
Singapore Desal Plant: "Biofilm growth reduced by 80% vs. 904L plates in pre-treatment systems."
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