What is Super Duplex S32750 (UNS S32750)?

Super Duplex S32750 (UNS S32750), also known as Super Duplex 2507, is a high-strength austenitic-ferritic stainless steel with excellent resistance to pitting, crevice corrosion, and chloride stress corrosion cracking. It is widely used in offshore, marine, and chemical processing applications.

What are the specifications for Super Duplex S32750 Pipes & Tubes?

Super Duplex S32750 Pipes are manufactured to ASTM A790 / A928 / ASME SA790 / SA928 and Tubes to ASTM A789 / ASME SA789 standards. They are available in seamless, welded, ERW, and EFW forms with outside diameters from 6.00 mm to 914.4 mm and wall thickness from 0.3 mm to 50 mm.

What are the applications of Super Duplex S32750 Pipes & Tubes?

Super Duplex S32750 Pipes & Tubes are widely used in offshore oil & gas platforms, chemical processing plants, desalination systems, heat exchangers, marine piping systems, and pressure vessels where high strength and corrosion resistance are critical.

What is the chemical composition of UNS S32750?

UNS S32750 contains Carbon (C) 0.020, Chromium (Cr) 25%, Nickel (Ni) 7%, Molybdenum (Mo) 4%, Nitrogen (N) 0.27%, and Sulphur (S) 0.001. This composition provides outstanding pitting and crevice corrosion resistance.

What is the difference between Super Duplex S32750 and S32760?

Both are super duplex stainless steels, but S32760 contains additional copper and tungsten for enhanced localized corrosion resistance. S32750 has slightly higher chromium, molybdenum, and nitrogen content offering excellent pitting and general corrosion resistance. For higher molybdenum requirements, S32760 pipes and tubes are recommended.

What are the mechanical properties of Super Duplex 2507 Pipe?

Super Duplex 2507 (UNS S32750) has a density of 7.8 g/cm³, melting point of 1350°C, minimum yield strength of 550 MPa, and minimum tensile strength of 800 MPa. These properties make it suitable for high-pressure and high-temperature applications.

Super Duplex S32750 Pipes & Tubes | Super Duplex 2507 Pipe Supplier

Super Duplex S32750 Pipes & Tubes are defined as high-strength, corrosion-resistant piping products engineered for demanding industrial conditions such as offshore platforms, oil & gas processing, chemical plants, and marine systems. As a leading manufacturer and supplier of Super Duplex Pipes & Tubes, we provide ASTM A790 UNS S32750 pipes and SA 789 UNS S32750 tubes in seamless, welded, ERW, and fabricated forms.

Super Duplex 2507 designated by UNS S32750, has an austenitic-ferritic microstructure with an optimal balance between strength and durability. It offers excellent mechanical strength along with the best resistance to pitting, crevice corrosion and chloride stress corrosion cracking among duplex stainless steels. As an experienced Super Duplex 2507 pipe supplier, we ensure strict compliance with international quality standards and dimensional tolerances.

Additionally, for applications that require higher levels of molybdenum, we carry Super Duplex S32760 pipes and tubes in our Super Duplex range of pipe products.

Specification of Super Duplex S32750 Pipes & Tubes

Parameter	Details
Specifications	Pipe – ASTM A790 / A928 / ASME SA790 / SA928 Tube – ASTM A789 / ASME SA789
Dimensional Standards	ANSI/ASME B36.19M ANSI/ASME B36.10M
Outside Diameter	6.00 mm OD to 914.4 mm OD
Thickness	0.3 mm to 50 mm
Schedules	SCH 5, SCH 10, SCH 40, SCH 80, SCH 160, SCH XS, SCH XXS
Size Range	Seamless Pipe – ½” NB to 16” NB Welded Pipe – ½” NB to 24” NB EFW Pipe – 6” NB to 24” NB Seamless Tube – ½” NB to 16” NB Welded Tube – ½” NB to 24” NB
Forms	Round, Square, Rectangular, Hollow, Instrumentation, Heat Exchanger
End Types	Plain End, Bevelled End, Threaded, Grooved

Equivalent Grades of ASTM A790 UNS S32750

Standard	UNS	WNR
Super Duplex 2507	S32750	1.4410

Chemical Composition of UNS S32750

Element	C	Cr	Ni	Mo	N	S
Value	0.020	25%	7%	4%	0.27%	0.001

Mechanical Properties of Super Duplex 2507 Pipe & Tube

Density	Melting Point	Yield Strength	Tensile Strength
7.8 g/cm³	1350°C	550 MPa (min)	800 MPa (min)

These properties make ASTM A790 UNS S32750 pipes suitable for high-pressure and high-temperature applications.

Manufacturing Process of Super Duplex S32750 Pipes & Tubes

The manufacturing of Super Duplex S32750 Pipes & Tubes follows strict metallurgical controls to maintain proper ferrite-austenite balance.

Rolling and Welding

Seamless pipes are produced using controlled hot rolling techniques. Welded ASTM A790 UNS S32750 pipes are formed from high-quality plates and welded using advanced welding procedures to preserve corrosion resistance and mechanical integrity.

Length Cutting

Precision cutting equipment ensures dimensional accuracy and compliance with international piping standards.

Cleaning and Heating Phase

Solution annealing and controlled heat treatment restore corrosion resistance and maintain phase balance in SA 789 UNS S32750 tubes.

Cold Drawing Process

Cold drawing enhances dimensional tolerance, surface finish, and mechanical performance, especially for instrumentation and heat exchanger tubing.

Finishing Process

Straightening
End beveling
Pickling and passivation
Surface polishing (if required)
Marking as per ASTM and ASME standards

Third Party Inspection

Each Super Duplex S32750 pipe undergoes:

PMI Testing
Hydrostatic Testing
Ultrasonic Testing
Radiographic Examination (for welded pipes)
Third-party inspection upon request

Applications of Super Duplex Steel UNS S32750 Pipes & Tubes

Super Duplex S32750 Pipes & Tubes are widely used in:

Offshore oil & gas platforms
Chemical processing plants
Desalination systems
Heat exchangers
Marine piping systems
Pressure vessels

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Super Duplex S32750 Pipes & Tubes