Products

UNS S32760 - 1.4410

Wst. 1.4410/1.4501

UNS 32750/S32760

Stock program: 6 – 25 mm OD / 1/4“ – 1” OD

Specification: ASTM A 789/ASME SA 789/EN ISO 1127 D4/T3 / EN 10216-5/NACE MR0175/PED 97/23 EC

Maximum service temperature: 300°C / 572°F


Super duplex is a material with an approximately equal amount of austenite and ferrite and is characterized by high Chromium and Molybdenum contents. These combine excellent corrosion resistance with high strength. Mechanical properties are approximately double those of singular austenitic steel and resistance to crevice corrosion and stress corrosion cracking is superior compared to the alloys 316L, 317L or duplex 2205 in chloride solutions. Also, in ambient and subzero (down to minus 50°C ) notch ductility is good. The super duplex 2507 is the most widely used grade.


Characteristics

  • High resistance to chloride pitting and crevice corrosion
  • Very high mechanical and physical properties
  • Good weldability and workability
  • Low rate of thermal expansions
  • Good general corrosion resistance

Market applications:

  • Chemical and Petrochemical industry
  • Offshore oil and gas industry
  • Subsea centralizes
  • Stream vessels
  • Heat exchanges

Technical details

Technical composition (%) Fe Cr Ni Mo Mn Si N C Cu P S
S32750 min   Bal.   24   6.0   3.0   1.2   0.80   0.24   0.030   -   -   -
  max   -   26   8.0   5.0   1.2   0.80   0.32   0.030   -   -   -
S32760 min   Bal.   24.0   6.0   3.0   1.00   1.00   0.20   0.050   0.50   -   -
  max   -   26.0   8.0   4.0   1.00   1.00   0.30   0.050   1.00   0.035   0.015
Mechanical properties S32750 S32760
Tensile strenght (mpa, min)   800   750
Yield strength (0.2% offset mpa, min)   550   550
Elongation (%, min)   25   25
Density / weight (g / cm3 / kg)   7.9   7.9

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