Super Duplex 2507 (UNS S32750) Seamless Pipes & Tubes Manufacturer & Supplier
Super Duplex 2507 (UNS S32750) is the premier super duplex stainless steel with PREN > 42, providing exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking in the most aggressive chloride environments. Its yield strength of 550 MPa is more than double that of 316L.
UNS: S32750 | Category: Super Duplex Stainless Steel | Werkstoff Nr: 1.4410 | EN Name: X2CrNiMoN25-7-4
Super Duplex 2507 — Also Known As
Super Duplex 2507 is also commonly known as Super Duplex 2507, 2507 Super Duplex, Super Duplex 2507 (UNS S32750) Seamless Pipes & Tubes, S32750, UNS S32750, 1.4410, Werkstoff 1.4410, W.Nr 1.4410, X2CrNiMoN25-7-4, 2507, f53, astm a182 f53, saf 2507.
Super Duplex 2507 — Applicable Standards & Specifications
Super Duplex 2507 is commonly supplied to ASTM A789, ASTM A790, ASME SA789, ASME SA790, EN 10216-5, EN 10217-7, ASTM A928, ASME SA928.
Size Range
Outer Diameter: 1/4" NPS to 10" NPS (6.35mm to 273.1mm OD)
Wall Thickness: SCH 5S to SCH 80S
Chemical Composition (%)
| C | Mn | Si | Cr | Ni | Mo | N | P | S |
|---|---|---|---|---|---|---|---|---|
| 0.030 max | 1.20 max | 0.80 max | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | 0.24-0.32 | 0.035 max | 0.020 max |
Mechanical Properties
- Tensile Strength
- 795 MPa min
- Yield Strength
- 550 MPa min
- Elongation
- 15% min
- Hardness
- 32 HRC max
Physical Properties
- Density
- 7.79 g/cm3
- Melting Range
- 1350-1400 C
- Thermal Conductivity
- 14 W/m-K
- Electrical Resistivity
- 880 nOhm-m
- Specific Heat
- 480 J/kg-K
- Coeff. of Thermal Expansion
- 13.0 um/m-C
Corrosion Resistance
- Pitting Resistance (PREN)
- >42 (typ. 42-44)
- Max Service Temp (Oxidizing)
- 315 C
- Intergranular Corrosion
- Highly resistant
- Stress Corrosion Cracking
- Outstanding resistance
- General Corrosion Rate
- <0.01 mm/yr
- Seawater Resistance
- Excellent up to 35C
Applicable Standards
- ASTM A789 / ASME SA789
- ASTM A790 / ASME SA790
- NORSOK MDS D56
- DIN EN 10216-5
Applications
- Subsea production systems
- Seawater piping and fire-fighting systems
- Offshore topsides process piping
- Desalination high-pressure systems
- Geothermal wells
- Sour gas handling (H2S)
Industries Served
- Offshore Oil & Gas
- Subsea
- Desalination
- Geothermal
- Mining
Key Advantages
- PREN > 42 for maximum pitting resistance
- Yield strength 3x that of 316L
- Excellent resistance to seawater up to 35C
- NORSOK approved for the most critical applications
- Outstanding fatigue and erosion resistance
- Suitable for sour service (NACE MR0175)
Equivalent Grades
- ASTM
- S32750
- NORSOK
- MDS D56
- Trade
- SAF 2507
Frequently Asked Questions
Super duplex 2507 seamless pipes — what should buyers know?
Super Duplex 2507 seamless pipes are high-strength, corrosion-resistant pipes made from UNS S32750 / WNR 1.4410 stainless steel. They are typically supplied to ASTM A790 or ASME SA790 in seamless form, with excellent resistance to chloride pitting, crevice corrosion, and stress corrosion cracking, for offshore, chemical, seawater, and heat-exchanger service.
What is the specification for Super Duplex 2507 seamless pipes?
Super Duplex 2507 seamless pipes are commonly manufactured in UNS S32750 / EN 1.4410 grade to ASTM A790 or ASME SA790. Depending on end use, they may be supplied as seamless pipe or tube with standard outside diameter, wall thickness, length, and tolerance requirements, plus test certificates covering chemistry, mechanical properties, and corrosion-related quality checks.
Where are 2507 seamless pipes used and why?
2507 seamless pipes are used in offshore platforms, seawater systems, desalination plants, chemical processing, pulp and paper, and heat exchangers. The grade combines high mechanical strength with strong resistance to pitting, crevice corrosion, and chloride stress corrosion cracking, making it suitable for aggressive saline and process environments where standard stainless grades can fail.
What is Super Duplex 2507 seamless pipe used for?
Super Duplex 2507 seamless pipe is selected for aggressive chloride-bearing environments where both corrosion resistance and high mechanical strength are required. Typical applications include offshore topside and subsea systems, seawater piping, heat exchangers, pressure vessels, fire-fighting lines, chemical processing, pulp and paper, and desalination plants.
What standards and tolerances apply to 2507 seamless pipes?
Super Duplex 2507 seamless pipes are commonly manufactured to ASTM A790 / ASME SA790, while dimensions are generally referenced to ASME B36.19M or B36.10M depending on wall thickness and schedule. Testing usually includes hydrostatic or nondestructive electric test, PMI, flattening, flaring, and dimensional checks, with tolerances as specified in the governing ASTM pipe standard.