Super Duplex Stainless Steel Tube 2507 Seamless Steel Pipe for Desalination Plants
Material Overview
The Super Duplex Stainless Steel Tube 2507, identified by UNS S32750, is a high-performance alloy engineered for extreme corrosion resistance and mechanical strength. Its unique microstructure—approximately 50% austenitic and 50% ferritic—combines the best properties of both phases, resulting in exceptional resistance to stress corrosion cracking, pitting, and crevice corrosion, especially in chloride-rich environments. This makes it particularly suitable for demanding applications such as desalination plants, offshore oil and gas platforms, and chemical processing industries.
Specifications
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Standards: ASTM A790 / ASME SA790
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Grades: UNS S32750, SAF 2507, EN 1.4410
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Forms Available: Seamless and Welded Pipes
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Sizes: Outer Diameter (OD): 4 mm to 219 mm; Wall Thickness: 0.5 mm to 20 mm
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Lengths: Single Random, Double Random, or Cut Lengths
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Finishes: Annealed, Pickled, Bright Annealed, Mechanical Polish, Mirror Finish
The chemical composition of Super Duplex Stainless Steel Tube 2507 is as follows:
| Element | Composition (%) |
| Carbon (C) | ≤ 0.030 |
| Chromium (Cr) | 24.0 – 26.0 |
| Molybdenum (Mo) | 3.0 – 5.0 |
| Nickel (Ni) | 6.0 – 8.0 |
| Nitrogen (N) | 0.24 – 0.32 |
| Manganese (Mn) | ≤ 1.20 |
| Silicon (Si) | ≤ 0.80 |
| Copper (Cu) | ≤ 0.50 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.020 |
| Iron (Fe) | Balance |
Mechanical Properties
The mechanical properties of Super Duplex Stainless Steel Tube 2507 are as follows:
| Property | Value |
| Ultimate Tensile Strength | ≥ 800 MPa (116 ksi) |
| Yield Strength (0.2% Offset) | ≥ 550 MPa (80 ksi) |
| Elongation | ≥ 25% |
| Hardness (HBN) | ≤ 270 |
| Reduction of Area | ≥ 45% |
| Charpy V-Notch Impact at Ambient Temperature | ≥ 80 J |
| Charpy V-Notch Impact at -46°C | ≥ 45 J |
| Ferrite Content | 35% – 55% |
These properties ensure the alloy's suitability for high-strength applications requiring resistance to various forms of corrosion.
Main Features
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High Resistance to Chloride Stress Corrosion Cracking: Ideal for environments with high chloride concentrations.
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Superior Resistance to Pitting and Crevice Corrosion: Enhanced durability in aggressive chemical environments.
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Excellent General Corrosion Resistance: Provides long-term reliability in various industrial applications.
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High Strength: Offers mechanical properties comparable to higher-alloyed materials, allowing for thinner sections and reduced weight.
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Good Weldability and Workability: Facilitates ease of fabrication and installation.
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Low Thermal Expansion: Minimizes thermal stresses during temperature fluctuations.
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Resistance to Erosion and Corrosion Fatigue: Ensures longevity in dynamic and abrasive conditions.
Applicable Standards
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ASTM: A790, A815, A182, A240, A276, A789
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ASME: SA790, SA815, SA182, SA240, SA276, SA789
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EN: 1.4410
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UNS: S32750
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Other Standards: GOST, JIS, GB (specific standards may apply depending on regional requirements)
Applications
Super Duplex Stainless Steel Tube 2507 is widely used in industries where high strength and corrosion resistance are critical:
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Desalination Plants: Used in heat exchangers, piping systems, and seawater intake structures due to its resistance to seawater corrosion.
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Offshore Oil and Gas Platforms: Employed in risers, manifolds, and subsea equipment exposed to harsh marine environments.
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Chemical Processing: Utilized in reactors, pressure vessels, and piping systems handling aggressive chemicals.
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Marine Applications: Applied in shipbuilding and offshore structures requiring materials resistant to seawater corrosion.
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Flue Gas Scrubbing Equipment: Used in systems designed to remove pollutants from exhaust gases.
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Pulp and Paper Industry: Employed in digesters, bleaching towers, and other equipment exposed to corrosive chemicals.
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Offshore Oil Production/Technology: Utilized in various components subjected to corrosive offshore conditions.
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Oil and Gas Industry Equipment: Applied in valves, pumps, and other equipment requiring high strength and corrosion resistance.
Q: Are you trading company or manufacturer ?
A: manufacturer,also can do trading.
Q: How long is your delivery time?
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock,
it is according to quantity.
Q: Do you provide samples? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
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