Duplex Steel UNS S32750, also known as Super Duplex 2507, is a highly alloyed stainless steel grade offering exceptional strength and outstanding corrosion resistance. The welded pipes and tubes manufactured from this alloy are widely used across industries such as oil & gas, marine, petrochemical, and power generation—where reliability and longevity are critical.
What is Duplex Steel UNS S32750?
Duplex Steel UNS S32750 is a super duplex stainless steel with a mixed microstructure of approximately 50% austenite and 50% ferrite. This dual-phase structure provides a unique combination of mechanical strength and corrosion resistance, far superior to that of conventional austenitic or ferritic stainless steels.
Key Chemical Composition (%):
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Chromium (Cr): 24 – 26
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Nickel (Ni): 6 – 8
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Molybdenum (Mo): 3 – 5
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Nitrogen (N): 0.24 – 0.32
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Iron (Fe): Balance
This composition results in high PREN (Pitting Resistance Equivalent Number) >40, making it ideal for harsh environments.
Features of UNS S32750 Welded Pipes & Tubes
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High Strength:
Duplex S32750 has nearly double the yield strength of conventional austenitic stainless steels like 304 and 316, allowing for thinner wall designs and cost-effective fabrication. -
Excellent Corrosion Resistance:
Offers superior resistance to:-
Pitting and crevice corrosion in chloride-rich environments
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Stress corrosion cracking (SCC)
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General corrosion and erosion
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Weldability:
Despite its high strength, Duplex S32750 can be easily welded using standard procedures, ensuring structural integrity in complex assemblies. -
Thermal & Pressure Resistance:
Ideal for high-temperature and high-pressure applications due to its robust mechanical properties. -
Long Service Life:
Reduced maintenance costs due to its durability, even in aggressive chemical and marine environments.
Applications of Duplex Steel S32750 Welded Pipes & Tubes
Because of their unique properties, these pipes and tubes are widely used in critical industries such as:
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Oil & Gas Industry: Offshore platforms, subsea piping, risers, and heat exchangers.
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Chemical Processing: Handling corrosive fluids in reactors, evaporators, and pipelines.
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Desalination Plants: High chloride resistance makes it ideal for seawater treatment.
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Pulp & Paper Industry: Digester systems, bleach washers, and liquor piping.
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Marine Engineering: Shipbuilding, ballast water systems, and propeller shafts.
Types & Sizes Available
Duplex UNS S32750 welded pipes and tubes are available in a wide range of sizes, schedules, and forms, such as:
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Welded Round Pipes & Tubes
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Square & Rectangular Welded Tubes
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Custom Fabricated Sections
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Polished or Annealed Finish
Standard sizes range from 1/2” to 24” OD and thicknesses up to SCH XXS, as per ASTM A790 / ASTM A928 standards.
Why Choose Duplex S32750 Welded Pipes & Tubes?
| Feature | Benefit |
|---|---|
| High Strength | Lighter structures, cost savings |
| Corrosion Resistance | Longer lifespan in aggressive media |
| Weldability | Easy fabrication & installation |
| Dual Phase Structure | Excellent performance under load |
| Economical | Lower life-cycle costs |
Conclusion
Duplex Steel UNS S32750 Welded Pipes & Tubes offer a powerful solution for industries requiring materials that can endure extreme environments without compromising on strength or longevity. With their unmatched mechanical performance, high resistance to various forms of corrosion, and economic efficiency, S32750 welded pipes & tubes continue to be a preferred choice for engineers and designers around the world.
If you are looking for reliable Duplex Steel S32750 pipe and tube suppliers, ensure that your source adheres to stringent quality standards and offers complete documentation and testing certifications for global project compliance.