‌S22053 Duplex Stainless Steel Product Introduction‌

‌1. Material Overview‌
S22053 (UNS S32205) is a premium-grade duplex stainless steel combining austenitic and ferritic microstructures in approximately equal proportions. This alloy delivers exceptional strength (yield strength ≥450 MPa) and corrosion resistance, making it ideal for harsh environments like marine and chemical processing applications.

‌2. Key Features‌

• ‌Corrosion Resistance‌: Outstanding performance in chloride-rich environments with PREN ≥35, surpassing 316L stainless steel in resisting pitting and stress corrosion cracking.
• ‌Mechanical Properties‌: Double the yield strength of standard austenitic steels (≥450 MPa) while maintaining 25% elongation.
• ‌Temperature Tolerance‌: Suitable for service from -50°C to 300°C, with rapid cooling required during heat treatment.

‌3. Applications‌

• ‌Oil & Gas‌: Subsea pipelines, pressure vessels, and sour service equipment (NACE MR0175 compliant).
• ‌Marine Engineering‌: Seawater desalination systems, ship propeller shafts, and offshore platform components.
• ‌Chemical Processing‌: Reactors and piping for acidic or chloride-containing media.

‌4. Fabrication Notes‌

• ‌Welding‌: Requires TIG/SAW with ER2209 filler wire, maintaining interpass temperature below 150°C.
• ‌Machining‌: Carbide tools recommended with reduced cutting speeds (30% slower than 304 stainless).

‌5. Competitive Advantages‌

• Replaces high-nickel alloys in aggressive media, reducing material costs by 20-30%.
• Certified to ASTM A790/A928 for seamless/welded pipes.