Products Description
Our Advantages
1. Corrosion Resistance
- Our ASTM A928 UNS S32750 steel pipe offers excellent corrosion resistance, with a PREN rating of ≥40. It undergoes salt spray and intergranular corrosion testing, ensuring its suitability for use in seawater, brine, and chemical process conditions.
- The pipes are verified through passivation testing to ensure a complete passive film on the pipe surface, enhancing their corrosion resistance.
2. High Strength
- UNS S32750 boasts a yield strength nearly twice that of austenitic stainless steels such as 316L, allowing for reduced wall thickness while maintaining strength. This makes it ideal for high-pressure and structural applications where excessive wall thickness is a concern.
- The material we use is tested by a spectrometer to ensure compliance with ASTM A928 standard specifications; flattening and flaring tests are performed to ensure the pressure resistance of the welded pipes in boiler systems.
3. High Dimensional Accuracy
- Our ASTM A928 UNS S32750 steel pipe is formed using computer-controlled roll-forming equipment to ensure consistent outer diameter and roundness before welding. After welding, the pipe is sized and calibrated with rollers to achieve the desired outer diameter and wall thickness with minimal deviation.
- The pipes undergo rigorous dimensional inspection, reducing the need for secondary processing and ensuring compatibility with piping systems, flanges, and subsea pipeline components.
4. Surface Treatment
- Our pipe undergoes solution annealing and pickling to enhance corrosion resistance. The pipe is polished for a smooth surface, and sandblasting and custom finishes are available.
- For high-purity applications, electropolishing is available, such as for high-purity chemicals, desalination, or offshore applications.
application areas
- Oil and Gas Industry: Offshore platforms and subsea pipelines, transmission lines.
- Chemical Processing: Heat exchangers and evaporators, piping for acid recovery, urea plants, and refineries.
- Power Generation: Flue gas purification systems, condensers exposed to seawater, and water feed systems.
- Desalination: Seawater inlet and outlet pipelines, heat exchanger and evaporator tubes, brine concentrate and permeate piping.
- Marine Industry: Ship exhaust systems, hull and deck fittings.
Chemical Composition
| Element | C (%) | Mn (%) | Si (%) | P (%) | S (%) | Cr (%) | Ni (%) | Mo (%) | N (%) | Fe (%) |
|---|---|---|---|---|---|---|---|---|---|---|
| UNS S32750 | ≤ 0.03 | ≤ 1.20 | ≤ 0.80 | ≤ 0.035 | ≤ 0.020 | 24.0 – 26.0 | 6.0 – 8.0 | 3.0 – 5.0 | 0.24 – 0.32 | Balance |
Mechanical Properties
| Property | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB/ HRC) | Impact Energy (J, RT) |
| UNS S32750 | ≥ 800 (116 ksi) | ≥ 550 (80 ksi) | ≥ 25 | ≤ 310 HB / ≤ 32 HRC | ≥ 60 |
Possible Alternative Grades
| Alternative Grades | Reasons |
| ASTM A790 UNS S32760 | Super duplex steel grades with similar corrosion resistance and mechanical properties. |
| ASTM A213 / A269 904L | Super austenitic stainless steels with good corrosion resistance but lower strength. |
| ASTM B677 AL-6XN | Super austenitic alloys with excellent resistance to pitting and crevice corrosion. |
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Products Package
FAQ
Q: What is ASTM A928 UNS S32750 pipe used for?
A: UNS S32750 possesses high strength and corrosion resistance and is primarily used in highly corrosive and high-pressure environments, such as offshore oil and gas, desalination plants, chemical processing, heat exchangers, and seawater systems.
Q: How does UNS S32750 compare to UNS S32205 (2205)?
A: UNS S32750 (2507) has higher strength and significantly better corrosion resistance than UNS S32205 (2205), especially in high-chloride and seawater environments. It is more suitable for demanding operating conditions.
Q: Can S32750 withstand the high pressure and high temperature conditions in offshore engineering?
A: Yes. Its yield strength is almost twice that of standard austenitic stainless steel, and it maintains excellent corrosion resistance in chloride-containing media, even at temperatures up to 300°C (572°F).
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