Stainless Steel Pipe Fittings

1.4501 F55 UNS S32760 Super Duplex Stainless Steel By yaang.com

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1.4501 F55 UNS S32760 Super Duplex Stainless Steel By yaang.com
1.4501, F55, UNS S32760 Super Duplex Stainless Steel has enhanced pitting and crevice corrosion resistance compared with the ordinaryaustenitic or duplex stainless steel types. This is due to the further additions of chromium, molybdenum, and nitrogen to these grades. 1.4501, F55, UNS S32760 Super Duplex Stainless Steel combines high strength and good ductility with outstanding corrosion resistance. With 1.4501, F55, UNS S32760 Super Duplex Stainless Steel having these attribute it is used in a wide range of marine, oil and gas environments. 1.4501, F55, UNS S32760 Super Duplex Stainless Steel is the most common super duplex grade.

1.4501, F55, UNS S32760 Super Duplex Stainless Steel has excellent corrosion resistance to a wide variety of media, with outstanding resistance to pitting and crevice corrosion in seawater and other chloride containing environments, with Critical Pitting Temperature exceeding 50°C. 1.4501, F55, UNS S32760 Super Duplex Stainless Steel has enhanced pitting and crevice corrosion resistance compared with the ordinary austenitic or duplex types. This is due to the further additions of chromium, molybdenum, and nitrogen to these grades. 1.4501, F55, UNS S32760 Super Duplex Stainless Steel combines high strength and good ductility with outstanding corrosion resistance.

Providing higher strength than both austenitic and 22% Cr Super Duplex Stainless Steel UNS S32760 (F55) is suited to a variety of applications in industries such as Chemical Processing, Oil & Gas, and Marine environments. Super Duplex Stainless Steel UNS S32760 (F55 / 1.4501) has excellent corrosion resistance to a wide variety of media, with outstanding resistance to pitting and crevice corrosion in seawater and other chloride containing environments, with Critical Pitting Temperature exceeding 50°C.


Chemical Composition                
 C. Cr. Cu. Mn. Mo. N. Ni. P. S. Si. W.
0.03% 24.00- 0.50- 1.00% 3.00- 0.20- 6.00- 0.035% 0.015% 1.00% 0.50-
max 26.00% 1.00% max 4.00% 0.30% 8.00% max max max 1.00%


Minimum Mechanical Properties at Room Temperature
(EN10088-3 1.4501, F55, UNS S32760 Super Duplex Stainless Steel 160mm dia max – solution treated)

Tensile (UTS) 730 – 930 N/mm²
 0.2% Proof Stress   530 N/mm² Min
 Elongation    25% min
Hardness   290HB Max
 Impact   100J

Super Duplex Stainless Steel Specifications  EN10088-3 UNS S32760 F55 1.4501 Grade X2CrNiMoCuWN25-7-4  ASTM A182 F55 NACE MR01-75 ISI 15156ASTM A276 A314 SAE J405 Norsok MDS D51 D55 D57 D58
Super Duplex stainless steel – with a microstructure of 50:50 austenite and ferrite, the steel has improved strength over ferritic and austenitic steel grades. With a higher than average Molybdenum and Chromium content, the material has greater heat and corrosion resistant qualities. 
With reduced production costs when compared with equivalent austenitic and ferritic grades and with greater yield and tensile strength, SuperDuplex is a cost effective solution for the consumer. It is conceivable that material thicknesses for a project may be reduced if SuperDuplex is used, thus reducing cost without compromising quality.



Benefits of 1.4501, F55, UNS S32760 Super Duplex Stainless Steel

  • Increased tensile & yield strength
  • Good ductility and toughness
  • SCC resistance
  • Corrosion resistance is better than Duplex
  • Cost effective


  • Applications

    UNS S32760 is used in the oil and gas industry, on offshore platforms, in heat exchanger, chemical processing equipment, pressure vessels and boilers.

    Oil and gas industry equipment,
    Offshore platforms, heat exchangers, process and service water systems, fire-fighting systems, injection and ballast water systems,
    Chemical process industries, heat exchanger, vessels, and piping,
    Desalination plants, high pressure RO-plants and seawater piping,
    Mechanical and structural components, high strength, corrosion-resistant parts,
    Power industry FGD systems, utility and industrial scrubber systems, absorber towers, ducting, and piping.

    1.4501, F55, UNS S32760 Super Duplex Stainless Steel Corrosion Resistance

    The high chromium and molybdenum content of 1.4501, F55, UNS S32760 Super Duplex Stainless Steel makes it extremely resistant to uniform corrosion by organic acids like formic and acetic acid. 1.4501, F55, UNS S32760 Super Duplex Stainless Steel also provides excellent resistance to inorganic acids, especially those containing chlorides.

    Source: Zhejiang Yaang Pipe Industry Co., Limited (www.yaang.com)

    Article Categories:
    Duplex Stainless Steel

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