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UNS S32760 (Super Duplex 1.4501) – Premium Corrosion‑Resistant Alloy for Sour Service

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

Properties

General

PropertyTemperatureValue

Density

23.0 °C

7.81 g/cm³

Mechanical

PropertyTemperatureValueComment

Charpy impact energy, V-notch

-40.0 °C

35 J

min.

23.0 °C

80 J

min.

Elastic modulus

23.0 °C

199 GPa

Elongation

23.0 °C

25 %

min.

Hardness, Brinell

23.0 °C

270 [-]

max.

Reduction of area

23.0 °C

45 %

min.

Tensile strength

23.0 °C

750 MPa

min.

Yield strength Rp0.2

23.0 °C

550 MPa

min.

Magnetic

PropertyTemperatureValue

Relative magnetic permeability

23.0 °C

33 [-]

Chemical properties

PropertyValueComment

Carbon

0.03 %

max.

Chromium

24 - 26 %

Copper

0.5 - 1 %

Iron

Balance

Manganese

1 %

max.

Molybdenum

3 - 4 %

Nickel

6 - 8 %

Nitrogen

0.2 - 0.3 %

Phosphorus

0.03 %

max.

Silicon

0.01 %

max.

Sulfur

0.01 %

max.

Tungsten

0.5 - 1 %

Technological properties

Property
Application areas

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.

Corrosion properties

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

Other

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


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