ASTM A790 UNS S32750 Super Duplex Stainless Steel Pipe specification

ASTM A790 UNS S32750 Super Duplex Stainless Steel Pipe Specification PDF

The ASTM A790 UNS S32750 Super Duplex stainless steel pipe specification PDF provides a comprehensive technical reference for seamless and welded super duplex pipes used in seawater, offshore, oil & gas, and desalination applications.


UNS S32750 offers exceptional resistance to chloride-induced pitting, crevice corrosion, and stress corrosion cracking (SCC), combined with high mechanical strength.

This page you can find the main informaiton about ASTM A790 S32750 pipe.

What Is ASTM A790?

ASTM A790 is the standard specification for seamless and straight-seam welded ferritic/austenitic (duplex and super duplex) stainless steel pipes intended for general corrosive service, with emphasis on resistance to chloride corrosion.

The standard defines:

  • Chemical composition

  • Mechanical properties

  • Heat treatment

  • Manufacturing and testing requirements

Material Grade: UNS S32750 Super Duplex Stainless Steel

UNS S32750 is a super duplex stainless steel with a balanced microstructure of approximately 50% ferrite and 50% austenite, providing superior corrosion resistance and high strength.

Properties of UNS S32750

  • PREN value ≥ 40

  • Excellent resistance to seawater corrosion

  • High resistance to chloride stress corrosion cracking

  • High yield strength (about twice that of austenitic stainless steel)

  • Excellent performance in marine and offshore environments

Size Range & Manufacturing (Specification Overview)

  • Outside Diameter: 1/8″ – 48″

  • Wall Thickness: SCH 10, SCH 40, SCH 80, SCH 160, XXS

  • Manufacturing: Seamless or welded

  • Delivery Condition: Solution annealed and quenched

Chemical Composition – UNS S32750 (wt %)

Element Requirement
Chromium (Cr) 24.0 – 26.0
Nickel (Ni) 6.0 – 8.0
Molybdenum (Mo) 3.0 – 5.0
Nitrogen (N) 0.24 – 0.32
Carbon (C) ≤ 0.03
Manganese (Mn) ≤ 1.20
Silicon (Si) ≤ 0.80
Phosphorus (P) ≤ 0.035
Sulfur (S) ≤ 0.020

Mechanical Properties (Room Temperature)

Property Requirement
Tensile Strength ≥ 800 MPa
Yield Strength (0.2%) ≥ 550 MPa
Elongation ≥ 15%

Heat Treatment Requirement

ASTM A790 UNS S32750 pipes shall be supplied in solution annealed condition, followed by rapid quenching.

Applications of Super Duplex S32750 Pipes

ASTM A790 UNS S32750 pipes are widely used in:

  • Seawater desalination plants

  • Offshore oil & gas pipelines

  • Chemical processing systems

  • Heat exchangers

  • Marine and coastal installations

  • High-pressure and high-corrosion environments

What you can find in this ASTM A790 S32750 PDF?

  • ASTM A790 standard overview

  • Chemical composition and mechanical properties

  • Heat treatment requirements

  • Manufacturing and testing requirements

📄 Download ASTM A790 UNS S32750 Super Duplex Pipe Specification PDF

The ASTM A790 UNS S32750 Super Duplex stainless steel pipe specification PDF is an essential technical document for projects requiring maximum corrosion resistance and strength in aggressive environments.
For pricing, technical support, and fast delivery, download the S32750 pipe datasheet and contact a reliable ASTM A790 Super Duplex pipe supplier today.

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