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Wuxi Yansheng Technology Co., Ltd. is a professional manufacturer of high-performance stainless steel tubing, with over 7 years of experience in the industry. Our Duplex Stainless Steel S32750 Tube is specifically engineered for high-efficiency heat exchange systems, offering an exceptional combination of strength, corrosion resistance, and thermal conductivity. This product is designed to meet the rigorous demands of chemical processing, power generation, and marine applications, ensuring reliable performance under extreme temperatures and pressures.
The S32750 grade, also known as UNS S32750, is a super duplex stainless steel with a balanced microstructure of austenite and ferrite. This unique composition provides twice the yield strength of conventional austenitic stainless steels, while maintaining excellent resistance to pitting, crevice corrosion, and stress corrosion cracking. Our tubes are manufactured in strict accordance with international standards such as ASTM A789/A790, ensuring dimensional accuracy and consistent mechanical properties.
As a trusted supplier to global markets including North America, Europe, and Southeast Asia, we have exported over US$50 million worth of products annually. Our ISO9001, ISO14000, and OHSAS18001 certified facilities, spanning 1,000–3,000 square meters, are equipped with advanced production lines and quality control systems. We offer customizable sizes, from 6mm to 219mm outer diameter, with wall thicknesses ranging from 0.5mm to 10mm, to meet your specific heat exchanger design requirements.
Key Features & Benefits
High Strength-to-Weight Ratio: S32750 offers a yield strength of 550 MPa minimum, allowing for thinner walled tubes without sacrificing structural integrity, reducing weight and material costs.
Superior Corrosion Resistance: With a PREN (Pitting Resistance Equivalent Number) of ≥40, it withstands aggressive chloride environments, seawater, and acidic media, extending service life.
Excellent Thermal Conductivity: The duplex structure provides better heat transfer efficiency compared to conventional stainless steels, improving overall system performance.
Fatigue Resistance: Ideal for cyclic thermal and pressure loads common in heat exchangers, minimizing maintenance downtime.
Weldability: Suitable for TIG, MIG, and laser welding processes; we can supply weld filler metals compatible with S32750.
Technical Specifications
| Property | Value |
| Tensile Strength (min) | 800 MPa |
| Yield Strength (0.2% offset, min) | 550 MPa |
| Elongation (min) | 25% |
| Hardness (HRC max) | 32 |
| PREN | ≥40 |
| Operating Temperature Range | -50°C to +300°C (depend on media) |
We also offer customized solutions including non-standard dimensions, special surface treatments, and end preparations (plain, beveled, threaded). Our tubes are available in straight lengths or coiled for long-run applications, and we can supply cut-to-size or bundled formats to meet your assembly line requirements.
Why Choose Wuxi Yansheng Technology?
With an annual export value exceeding US$50 million and a dedicated team of 101–200 employees, we have established a solid reputation for quality and reliability. Our factory is certified under ISO9001, ISO14000, OHSAS18001, and HACCP standards, ensuring that every production step meets strict international criteria. We ship from major ports including Tianjin, Shanghai, Qingdao, and Ningbo, providing efficient logistics to customers worldwide.
Our quality control system includes 100% dimensional inspection, hydrostatic testing, eddy current testing, and intergranular corrosion testing (upon request). We also provide material test certificates (MTC) traceable to the mill. Whether you need a prototype for a new heat exchanger design or a bulk order for a large-scale project, we are equipped to deliver with consistent quality and on-time delivery.
Ready to optimize your heat exchange system? Contact our sales team for a quotation or technical datasheet. We welcome OEM/ODM partnerships and can provide samples for qualification. Your satisfaction is our priority.
Frequently Asked Questions
Q: What is the difference between S32750 and other duplex grades like 2205?
A: S32750 (super duplex) has higher chromium, molybdenum, and nitrogen content, resulting in higher strength and better corrosion resistance (PREN ≥40) compared to 2205 (PREN ~35). It is ideal for more aggressive environments.Q: Can you provide tubes with a specific surface finish for heat exchanger applications?
A: Yes, we offer pickled, bright annealed, and polished finishes. For heat exchangers, a pickled or bright annealed surface is typically recommended to minimize fouling and improve heat transfer.Q: What is the maximum length you can produce?
A: Standard lengths are up to 12 meters. For longer continuous tubes, we can discuss custom solutions or supply coiled tubes depending on the diameter.Q: Do you have certifications for offshore or marine applications?
A: Our products are manufactured under ISO9001 and ISO14000 certified systems, and we can provide NORSOK or other marine certifications upon request, subject to third-party inspection.Q: What is the minimum order quantity (MOQ)?
A: MOQ depends on the size and specification. For standard sizes, the MOQ is typically 500 kg. For special dimensions, please contact us for a detailed quote.Q: How do you ensure the tubes are free from defects?
A: We perform 100% eddy current testing, hydrostatic testing, and dimensional checks. Additionally, we can arrange third-party inspection (e.g., SGS, BV) as per your requirement.Q: Can you supply tubes with a welded or seamless manufacturing process?
A: S32750 tubes are available in both seamless (ASTM A789) and welded (ASTM A790) forms. We advise on the suitable process based on the application pressure and temperature.Q: What is the typical lead time for a standard order?
A: For standard sizes, the lead time is 15–25 working days after confirmation. For large or customized orders, please allow 30–45 days. We can expedite for urgent projects.
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