ASTM A790 S32205 Seamless Duplex Stainless Steel Tube High Strength Corrosion Resistant for Offshore Applications
ASTM A790 S32205 Seamless Duplex Stainless Steel Tube High Strength Corrosion Resistant for Offshore Applications
YUHONG GROUP is a specialized manufacturer of high-performance duplex stainless steel products, with over 30 years of expertise in serving global energy and chemical industries. Our ASTM A790 S32205 Seamless Duplex Stainless Steel Tubes combine superior corrosion resistance with exceptional mechanical strength for the most demanding applications.
Heat Treatment Requirements for UNS S32205
| Parameter | Requirement |
| UNS Designation | S32205 |
| Type | 2205 |
| Temperature Range | 1870–2010 °F [1020–1100 °C] |
| Quenching Method | Rapid cooling in water or by other means |
Chemical Composition of UNS S32205
| Element | Requirement (%) | Notes |
| Carbon (C) | ≤0.030 | Controls carbide formation |
| Manganese (Mn) | ≤2.00 | Improves hot workability |
| Phosphorus (P) | ≤0.030 | Minimizes brittleness |
| Sulfur (S) | ≤0.030 | Enhances machinability |
| Silicon (Si) | ≤1.00 | Deoxidizer and strength enhancer |
| Nickel (Ni) | 4.5-6.5 | Austenite stabilizer |
| Chromium (Cr) | 22.0-23.0 | Primary corrosion resistance |
| Molybdenum (Mo) | 3.0-3.5 | Pitting resistance enhancer |
| Nitrogen (N) | 0.14-0.20 | Strength and corrosion resistance |
Tensile and Hardness Requirements for UNS S32205
| Property | Requirement | Unit |
| UNS Designation | S32205 | - |
| Type | 2205 | - |
| Tensile Strength, min | 95 [655] | ksi [MPa] |
| Yield Strength, min | 65 [450] | ksi [MPa] |
| Elongation in 2 in. or 50 mm, min | 25 | % |
| Hardness, max (HBW) | 290 | HBW |
| Hardness, max (HRC) | 30 | HRC |
ASTM A790 S32205 Seamless Duplex Stainless Steel Tube - Key Application Advantages
1. Superior Mechanical Strength for Offshore Structures
Minimum yield strength 450 MPa (65 ksi) withstands extreme ocean wave loads and high-pressure drilling operations
25% minimum elongation provides critical ductility to absorb dynamic stresses in subsea pipelines
2. Unmatched Corrosion Resistance in Marine Environments
PREN ≥ 35 (Cr+3.3Mo+16N formula) prevents pitting/crevice corrosion in chloride-rich seawater
Resists stress corrosion cracking (SCC) under tension in the splash zone and submerged conditions
3. Long-Term Reliability in Critical Applications
50+ year service life in North Sea oil platforms (documented cases)
Maintenance cost reduction up to 60% compared to 316L systems through eliminated cathodic protection needs
4. Operational Safety Enhancements
Inherent fire resistance maintains structural integrity at high temperatures (PED compliance)
Zero toxicity leaching ensures compatibility with seawater cooling for LNG processing
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