S32205/2205 Duplex Stainless Steel: Balanced Strength and Corrosion Resistance
S32205 (also known as 2205) is a nitrogen-enhanced duplex stainless steel with a microstructure of 50% austenite and 50% ferrite. Its chemical composition includes 21-24% chromium, 4.5-6.5% nickel, 2.5-3.5% molybdenum, and 0.08-0.20% nitrogen, delivering a unique combination of high strength and corrosion resistance.
With a yield strength exceeding 450 MPa—twice that of austenitic grades like 316L—it enables weight reduction in structural designs, enhancing cost-effectiveness. It resists pitting, crevice corrosion, and chloride stress corrosion cracking, outperforming many austenitic steels in harsh environments. Its thermal conductivity is higher and thermal expansion lower than austenitic stainless steels, improving heat transfer efficiency.
S32205/2205 excels in chemical processing (pressure vessels, piping), oil and gas exploration, marine cargo tanks, and pulp/paper manufacturing. It thrives in high-chloride environments, such as seawater applications, and maintains performance in temperatures ranging from -50°F to 600°F (-46°C to 316°C). Its good weldability and durability make it a versatile choice for industries requiring both strength and corrosion resistance.
With a yield strength exceeding 450 MPa—twice that of austenitic grades like 316L—it enables weight reduction in structural designs, enhancing cost-effectiveness. It resists pitting, crevice corrosion, and chloride stress corrosion cracking, outperforming many austenitic steels in harsh environments. Its thermal conductivity is higher and thermal expansion lower than austenitic stainless steels, improving heat transfer efficiency.
S32205/2205 excels in chemical processing (pressure vessels, piping), oil and gas exploration, marine cargo tanks, and pulp/paper manufacturing. It thrives in high-chloride environments, such as seawater applications, and maintains performance in temperatures ranging from -50°F to 600°F (-46°C to 316°C). Its good weldability and durability make it a versatile choice for industries requiring both strength and corrosion resistance.