Call Us Anytime - +91-22-6610 9683 export@oshwin.com

Difference Between Duplex And Super Duplex Steel

Duplex Stainless Steel – UNS S31803 / UNS S32205

Duplex Steel also known as Duplex 2205 Stainless Steel is a two-phase, ferritic and austenitic steel with 22% chromium (22cr Duplex) 3% molybdenum, 5 to 6% nickel alloyed stainless steel also known as x2crnimon22-5-3 used extensively in applications that require good corrosion resistance & strength. Heat treatment of Duplex SS 2205 is solution treatment (annealing), between 1020 – 1100°C, followed by rapid cooling. 22 Cr Duplex Stainless Steel cannot be hardened by heat treatment. They can however be work hardened.

1.4462 Stainless Steel Equivalent – 1.4462 | 22Cr Duplex | UNS S31803 (F51) | UNS S32205 (F60) | Alloy 2205 | Sandvik – SAF 2205 | Duplex 2205 | x2crnimon22-5-3 | FALC223 | URANUS 45N (UR 45N) | RA2205 Cronifer® 2205 LCN.

SAF 2205 is Duplex (Austenitic-Ferritic) Stainless Steel characterized by –

  • High resistance to stress corrosion cracking (SCC) in chloride-bearing environments.
  • High resistance to stress corrosion cracking (SCC) in environments containing hydrogen sulfide.
  • High resistance to general corrosion, pitting, and crevice corrosion.
  • High resistance to erosion corrosion and corrosion fatigue.
  • High mechanical strength – roughly twice the proof strength of austenitic stainless steel.
  • Physical properties that offer design advantages.
  • Good weldability.

 

Super Duplex Stainless Steel – UNS S32750 / UNS S32760

Super Duplex Steel also known as SAF 2507 or Super Duplex 2507 with UNS S32750 and UNS S32760 (1.4410 / 1.4501 / F53 / F55 / 2507) is a high alloy duplex stainless steel with a PRE value of min.40*. Super Duplex S32750 and Super Duplex S32760 has 25% chromium (25Cr Duplex), 4% molybdenum, and 7% nickel also known as X2CrNiMoN25 7 4. This high molybdenum, chromium and nitrogen content causes high resistance to chloride pitting and crevice corrosion attack and the duplex structure provides 2507 with exceptional resistance to chloride stress corrosion cracking.

Super Duplex Equivalent names – 25Cr Duplex | 2507 | UNS S32750 (F53) | UNS S32760 (F55) | 1.4410 | Alloy 2507 | SAF 2507 | Super Duplex S32750 | Super Duplex S32760 | X2CrNiMoN25.7.4 | Stainless Steel Super Duplex | 2750 | Duplex 2507 | 1.4501 | Zeron 100 | Super Duplex 2507 | Duplex 2507.

SAF 2507 is a Super Duplex (Austenitic-Ferritic) Stainless Steel is characterized by –

  • Excellent resistance to stress corrosion cracking (SCC) in chloride-bearing environments.
  • Excellent resistance to pitting and crevice corrosion.
  • High resistance to general corrosion.
  • Very high mechanical strength.
  • Physical properties that offer design advantages.
  • High resistance to erosion corrosion and corrosion fatigue.
  • Good weldability.

 

Looking for some more information ?

Get Best Quotes or Send us your Requirement

Contact Us Now