ASTM ASME 2205 F60 Stainless Steel Pipes & Tubes

ASTM/ASME 2205 (F60) Stainless Steel Pipes & Tubes are hyper-duplex (austenitic-ferritic) grade products (UNS S32205) conforming to ASTM A790/A928 standards, featuring an optimized nitrogen-enhanced composition (22-23% Cr, 4.5-6.5% Ni, 3.0-3.5% Mo, 0.18-0.25% N) for superior mechanical strength (≥550 MPa yield) and corrosion resistance (PREN ≥38) compared to standard 2205/F51. This advanced duplex alloy delivers exceptional pitting and crevice corrosion resistance in extreme chloride environments, with proven performance in offshore oil/gas systems, chemical processing equipment, and seawater cooling applications where both high stress and aggressive media are present. The precisely controlled ferrite-austenite phase balance (40-60%) ensures optimal weldability and thermal stability up to 300°C (572°F), while its nitrogen enrichment provides enhanced resistance to stress corrosion cracking and improved as-welded properties. Particularly specified for critical pressure components in sour service (NACE MR0175/ISO 15156 compliant), subsea pipelines, and FGD systems where maximum durability against pitting and sulfide stress cracking is required, offering a cost-effective alternative to super duplex grades in many demanding applications.