Super Duplex | UNS S32750 | ASTM/ASME A240 / F53 |1.4410
Excellent corrosion resistance against general corrosion, stress corrosion cracking, corrosion fatigue, pitting, crevice and erosion corrosion and possessing very high mechanical strength properties.
Good weldability, post weld heat treatment not necessary.
Max. Temperature for long periods of service: 280¡ãC (536¡ãF) / (300¡ãC/572¡ãF possible for short periods).
Surface condition for optimum corrosion resistance: pickled or machined.
Application Components in offshore, waste water, sea water desalination and chemical plants with aggressive chloride-containing media e.g. heat exchangers, compressor and pump components.
TECHNICAL INFO
Chemical Composition (average %)
Hot Forming: Forging 1200 to 950¡ãC / Air cooling Heat Treatment
Solution annealing:
1150 to 1000¡ãC (2102-1832¡ãF) Air cooling
Solution annealing / quenching:
1100¡ãC (2012¡ãF) Water, air (thickness below 2mm) Structure as quenched:
Weldability of super duplex 32750 is good. The welding procedures are similar to those applied for conventional duplex grades. Welding consumables for different welding methods are available.
MECHANICAL PROPERTIES
Condition: solution annealed
HIGHT TEMPERATURE PROPERTIES
Condition: solution annealed/quenched
