Duplex & Super Duplex Steel Grades
Duplex stainless steels combine the strength of ferritic grades with the corrosion resistance of austenitic grades. Their mixed microstructure (≈50/50 austenite-ferrite) delivers twice the yield strength of 304/316, excellent stress corrosion cracking resistance, and good weldability.
2205 (S31803 / S32205)
S31803 / S32205The most widely used duplex stainless steel. Offers roughly double the yield strength of 316L with superior chloride stress corrosion cracking resistance. The perfect balance of strength, corrosion resistance, and cost for offshore, chemical, and desalination applications. S32205 (enhanced) has tighter chemistry for improved corrosion properties.
2507 (S32750)
S32750Super duplex stainless steel with enhanced chromium, molybdenum, and nitrogen content. Offers significantly higher strength and corrosion resistance than standard 2205. PREN ≥ 40 makes it suitable for the most aggressive chloride environments including hot seawater and sour well conditions. The ultimate alloy for critical offshore and subsea applications.
S32760 (Zeron 100)
S32760Super duplex stainless steel with tungsten and copper additions for superior corrosion resistance in the most demanding environments. Higher PREN (≥40) than 2205 with improved performance in hot chloride, sulfuric acid, and sour service. The tungsten addition enhances pitting resistance, while copper provides resistance to sulfuric acid. A direct competitor to 2507 with slightly different optimized properties.