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SUPER DUPLEX S32760 / F55 / 1.4501

Super Duplex S32760/ F55 , Super Duplex Alloy UNS S32760 (F55 / 1.4501) has excellent resistance Pitting and Crevice Corrosion in seawater at elevated temperatures, supplied with a PREN 40<( Pitting Resistance Eqv) . Excellent resistance to SCC ( Stress Corrosion Cracking) in Sour and Chloride environments .

Providing higher strengths than both austenitic and 22% Cr Duplex Stainless Steels UNS S32760 (F55) is suited to a variety of applications in industries such as Oil & Gas, CPI(Chemical Processing Industries), and Marine environments.

UNS S32760 (F55 / 1.4501) is listed in NACE MR 01 75 for sour service and having gained ASME Approval for Pressure Vessel applications.

Material Data Sheet

Alloy Super Duplex S32760
Material No. 1.4501
EN symbol (short) X2CrNiMoCuWN25-7-4
UNS UNS S32760
Registered work label ASTM A182/ F55

Chemical composition

C Cr Cu Fe Mo Mn
% ≤ % ≤ %   % %
0.030 max 24<26 0.5<1.0 Reminder 3.0<4.0 1.0 max
N Ni P S Si W
% % % % ≤ % %
0.20<0.30 6.0<8.0 0.030 max 0.010 max 0.010 max 0.50<1.0

Special Properties

Youngs Modulus N/mm2 Density kg/dm³: Magnetic Permeability
199 x 10³ 7.81 g/cm³ 33

Excellent Resistance to pitting and crevice / erosion corrosion


  • EN 10088-3 1.4501
  • ASTM A473 UNS S32760 Forgings
  • ASTM A182 Grade F55 UNS S32760 Forged Flanges
  • ASTM A240 UNS S32760 Sheet and Plate
  • ASTM A479 UNS S32760 Bar
  • ASTM A276 UNS S32760 Condition A
  • NACE MR 01-75


The material comes with a 3.1 certification.
3.2 certification are available with surcharge.

Mechanical Properties

0.2% Proof Stress (N/mm2 ) [ksi] minimum 550 550 [79.8]
Ultimate Tensile Strength (N/mm2) [ksi] minimum 750 [108.8]]
Elongation (%) minimum 25
Hardness (HBN) 270max
Reduction of Cross Section Area (%) minimum 45
Charpy V-notch Impact at ambient Temp (J) [ft.lb] 80min [59min]
Charpy V-notch Impact at -46°C (J) [ft.lb] 45av, 35min [33av, 25.8min]

Delivery program

Various sizes and tolerances available upon request.

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Wido Glombitza
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