Exporter of super duplex stainless steel seamless tube, ASTM A789/A790 super duplex seamless tubing, seamless super duplex 2507 Heat Exchanger Tubes, UNS S32750 seamless tubing, 2507 Bright Annealed Tubes, UNS S32760 Cold Drawn and Polished tubes. at competitive prices — inquire now for bulk requirements.
At New Eagle Industrial Corporation, we offer premium Super Duplex Stainless Steel Seamless Tubes designed to deliver exceptional performance in the most demanding industrial environments. Manufactured to ASTM A789 / A790 standards and available in UNS S32750 / S32760 grades, these tubes are engineered for applications that require both high mechanical strength and superior corrosion resistance. Their balanced austenitic-ferritic microstructure ensures excellent durability under high-pressure, high-temperature, and chloride-rich conditions, making them ideal for offshore, petrochemical, and chemical processing industries.
Our Super Duplex seamless tubes are hot-extruded, cold-drawn, and solution-annealed to achieve tight dimensional tolerances, uniform wall thickness, and flawless surface finishes. This meticulous production process not only enhances mechanical properties but also optimizes resistance to pitting, crevice, and stress corrosion cracking, critical for harsh marine and industrial environments.
By choosing New Eagle Steel’s Super Duplex Seamless Tubes, industries gain long-lasting reliability, minimal maintenance, and superior operational safety in even the most aggressive conditions.
Our commitment to quality, precision, and timely delivery ensures that each Super Duplex 2507 tube leaving our facility meets rigorous international standards and exceeds customer expectations. With New Eagle Steel, clients benefit from technical expertise, comprehensive material testing, and support throughout their project lifecycle, making us a trusted partner for industrial tubing solutions worldwide.
Super Duplex 2507 Seamless Tubes – Technical Specifications
ASTM A789/A790 Super Duplex Seamless Tubes – Chemical Composition
Super Duplex Stainless Steel Seamless Tubes (UNS S32750 / S32760) feature a balanced composition of austenite and ferrite, providing exceptional strength, superior pitting resistance, and high corrosion resistance in chloride-rich and marine environments. The presence of molybdenum, chromium, and nitrogen enhances resistance to localized corrosion and ensures long-term durability in offshore and chemical process applications.
| Element | UNS S32750 (%) | UNS S32760 (%) |
|---|---|---|
| Chromium (Cr) | 24.0 – 26.0 | 24.0 – 26.0 |
| Nickel (Ni) | 6.0 – 8.0 | 6.0 – 8.0 |
| Molybdenum (Mo) | 3.0 – 5.0 | 3.0 – 4.5 |
| Nitrogen (N) | 0.24 – 0.32 | 0.20 – 0.30 |
| Manganese (Mn) | ≤ 1.20 | ≤ 1.00 |
| Silicon (Si) | ≤ 0.80 | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.035 | ≤ 0.030 |
| Sulfur (S) | ≤ 0.020 | ≤ 0.010 |
| Carbon (C) | ≤ 0.030 | ≤ 0.030 |
| Iron (Fe) | Balance | Balance |
Super Duplex 2507 Seamless Tubes – Mechanical Properties
Super Duplex Stainless Steel Seamless Tubes (UNS S32750 / S32760) exhibit exceptionally high mechanical strength, nearly double that of standard austenitic stainless steels. Their superior yield and tensile strength, combined with excellent toughness and impact resistance, make them ideal for offshore, petrochemical, and high-pressure industrial applications.
| Property | UNS S32750 | UNS S32760 |
|---|---|---|
| Tensile Strength (MPa) | 795 – 930 | 750 – 930 |
| Yield Strength (0.2% Proof, MPa) | ≥ 550 | ≥ 550 |
| Elongation (%) | ≥ 25 | ≥ 25 |
| Hardness (Brinell HB) | ≤ 310 | ≤ 310 |
| Impact Toughness (Charpy V-notch, J) | ≥ 45 (at -46°C) | ≥ 45 (at -46°C) |
| Modulus of Elasticity (GPa) | ~200 | ~200 |
| Density (g/cm³) | 7.8 | 7.8 |
UNS S32750 / S32760 Seamless Tubes – Equivalent Grades
Super Duplex Stainless Steel Seamless Tubes are available in a wide range of international equivalent grades such as UNS S32750 / S32760, WNR 1.4410 / 1.4501, and DIN X2CrNiMoN25-7-4, ensuring global compatibility and standards compliance. These equivalents enable easy material selection for offshore, marine, and chemical process industries worldwide.
| Standard | Super Duplex Grade |
|---|---|
| UNS | S32750 / S32760 |
| ASTM / ASME | A789 / A790 |
| Werkstoff Nr. (WNR) | 1.4410 / 1.4501 |
| EN / DIN | X2CrNiMoN25-7-4 / X2CrNiMoCuWN25-7-4 |
| ISO | 2507 / 23276 |
| JIS | SUS32750 / SUS32760 |
| GOST (Russia) | 06ХН28МДТ |
| BS (British Standard) | SDSS 2507 |
| AFNOR (France) | Z3CND25-06Az / Z3CND25-07Az |
What are ASTM A789 and ASTM A790 standards, and why are they used for Super Duplex Seamless Tubes?
- ASTM A789 – General Service Tubing Standard:
- Covers seamless and welded duplex and super duplex stainless steel tubes for pressure and heat transfer applications.
- Ensures tight dimensional tolerances, high corrosion resistance, and excellent mechanical strength.
- Used in heat exchangers, condensers, desalination systems, and process piping.
- ASTM A790 – High-Pressure Piping Standard:
- Designed for seamless and welded duplex/super duplex pipes and tubes used in offshore, petrochemical, and power plant applications.
- Specifies chemical composition, hardness, tensile properties, and testing methods.
- Ensures reliability under high-pressure and chloride-rich conditions.
- Why They’re Used:
- These ASTM standards maintain consistent quality and traceability across global projects.
- They define testing protocols such as hydrostatic, eddy current, and ultrasonic tests to ensure defect-free tubes.
- Compliance with ASTM A789/A790 guarantees that New Eagle Steel’s Super Duplex tubes are globally accepted and fit for critical service conditions.
What are UNS S32750 and UNS S32760, and how do they differ?
- UNS S32750 (Super Duplex 2507):
- Nominal composition: 25% Cr, 7% Ni, 4% Mo, 0.27% N.
- Designed for excellent pitting and crevice corrosion resistance.
- Used in seawater handling, chemical process, and high-stress environments.
- UNS S32760 (Zeron 100 Equivalent):
- Nominal composition: 25% Cr, 7% Ni, 3.6% Mo, 0.7% Cu, 0.25% N.
- The addition of copper and tungsten improves resistance to strong acids (e.g., sulfuric acid) and localized corrosion.
- Suitable for desalination plants, oil & gas pipelines, and marine systems.
- Performance Difference:
- S32760 offers slightly better corrosion resistance in highly aggressive environments due to the presence of Cu and W.
- S32750 provides higher mechanical stability and improved cost efficiency for general industrial use.
What is the microstructure of Super Duplex Stainless Steel, and why is it important?
Super Duplex Stainless Steels feature a dual-phase microstructure composed of approximately 50% austenite and 50% ferrite. This structure is achieved through precise heat treatment and controlled chemical composition, ensuring superior mechanical and corrosion properties.
Key Technical Advantages of the Dual-Phase Microstructure:
Ferrite Phase:
- Provides exceptional strength and outstanding resistance to chloride-induced stress corrosion cracking.
Austenite Phase:
- Enhances toughness and ductility, ensuring excellent weldability and formability in demanding applications.
Balanced Microstructure:
- Delivers uniform corrosion resistance, improved fatigue strength, and consistent performance under cyclic loading conditions.
This unique combination of phases makes Super Duplex Stainless Steels ideal for marine, chemical processing, oil & gas, and desalination industries, offering exceptional long-term dimensional stability and mechanical reliability in harsh environments.
Global Export Network for Super Duplex 2507 Seamless Tubing
As a trusted manufacturer and exporter, New Eagle Steel supplies Super Duplex 2507 Seamless Tubes globally. Our high-performance products are widely used in chemical processing, pollution control, marine, and pharmaceutical industries across Europe, the Middle East, Asia, and the Americas, ensuring exceptional corrosion resistance, reliability, and precision engineering.
- Middle East: United Arab Emirates (UAE), Saudi Arabia, Qatar, Kuwait, Oman, Bahrain, Yemen, Iran, Iraq, Israel, Jordan, Lebanon, Syria, Turkey
- North Africa: Egypt, Algeria, Morocco, Tunisia, Libya
- Asia Pacific: Singapore, Malaysia, Vietnam, Indonesia, Thailand, Philippines, Cambodia, Laos, Myanmar, Brunei, Timor-Leste, Taiwan, Japan, South Korea
- Europe: Spain, Belgium, Netherlands, France, Germany, Italy, United Kingdom (England), Poland, Cyprus, Malta, Russia
- Americas: Brazil, Mexico, Chile, Peru, Colombia, Argentina, United States (USA), Canada
- India: Chennai, Coimbatore, Bangalore, Thiruvananthapuram, Pune, Kolkata, Kerala, Karnataka, Gujarat, Mumbai, Delhi
Where Super Duplex S32750 / S32760 Seamless Tubes Are Used - Industrial Applications
Oil & Gas Industry
Petrochemical & Chemical Processing
Power Generation (Thermal, Nuclear & Renewable)
Marine & Offshore Engineering
Pharmaceuticals & Biotechnology
Food, Beverage & Dairy Processing
Pulp & Paper Industry
Aerospace & Defense
Automotive & Transportation
Instrumentation & Control Systems
Water Treatment & Desalination
HVAC & Heat Exchanger Systems
Construction & Infrastructure Projects
Mining & Metallurgy
