Super Duplex 2507 ASTM A790 UNS S32750 Stainless Steel Seamless Pipe
ASTM A790 / ASME SA790 UNS S32750 Seamless Super Duplex Stainless Steel Pipe
Super duplex stainless steel pipes typically contain higher levels of chromium, molybdenum, and nitrogen compared to standard duplex stainless steels. This composition provides increased strength and corrosion resistance. While super duplex steel pipes offer excellent properties, they can be more challenging to weld compared to other types of stainless steels. Due to their superior properties, super duplex stainless steel pipes are generally more expensive than standard duplex or austenitic stainless steel pipes. However, the long-term cost savings from their durability and corrosion resistance can outweigh the initial investment.
They are commonly used in industries such as oil and gas, chemical processing, marine environments, and desalination plants where corrosion resistance and high strength are crucial requirements.
ASTM A790 / ASME SA790 S32750 Standard Specification
| Standard | ASTM A790, ASME SA790 |
| Equivalent Standards | DIN 17458, GOST 9941-81, GOST 9940-81, EN 10216-5, ASTM A790, ASME SA790, DIN 17456 |
| Material | S32750 |
| Equivalent Materials | X2CrNiMoN25-7-4, 1.4410, 2507, F53 |
| Related Products | stainless steel tube, stainless steel pipe, heat exchanger steel tube |
Duplex Steel Pipe Chemical Composition
| Grade |
C max |
Si max |
Mn max |
P max |
S max |
Cr | Ni | Mo | N |
| UNS S32750 | 0.030 | 0.8 | 1.2 | 0.030 | 0.015 | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | 0.24-0.32 |
| UNS S31803 | 0.030 | 1.0 | 2.0 | 0.020 | 0.020 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.20 |
| UNS S31500 | 0.030 | 1.0 | 1.2-2.0 | 0.030 | 0.030 | 18.0-19.0 | 4.5-5.5 | 2.5-3.5 | 0.05-0.10 |
Duplex Steel Pipe Physical Properties
| Grade | Y.S.MPa min | T.S.Mpa min | Elongation % | Hardness HRC |
| UNS S32750 | 550 | 800 | 15 | 20 |
| UNS S31803 | 450 | 620 | 25 | 20 |
| UNS S31500 | 440 | 630 | 30 | 20 |
Types of S32750 Seamless & Welded Pipe:
|
S32760 Seamless Pipe |
Duplex S32750 Thin Wall Pipe |
Some of the quality tests carried out by us includes
| Corrosion Test | Conducted only when specially requested by the client |
| Chemical Analysis | Test done as per required quality standards |
| Destructive / Mechanical Testing | Tensile | Hardness | Flattening | Flare | Flange |
| Reverse-bend and Re. flat tests | Carried out in full compliance with relevant standards & ASTM A-450 and A-530 norms, which ensures trouble-free expansion, welding & use at customers end |
| Eddy Current Testing | Done to detect homogeneities in subsurface by using Digital Flaw-mark Testing System |
| Hydrostatic Testing | 100% Hydrostatic Testing carried out according to ASTM-A 450 norms for checking tube leakage, and biggest pressure we can support 20Mpa/7s . |
| Air Under Pressure Test | To check any evidence of air leakage |
| Visual Inspection | After passivation, every single length of tubes & pipes is subjected to thorough visual inspection by trained staff for detecting surface flaws & other imperfections |
Application
- Oil and gas industry for offshore platforms, subsea pipelines, and topside processing facilities.
- Chemical and petrochemical industry for processing equipment, storage tanks, and piping systems.
- Marine industry for shipbuilding, desalination plants, and offshore structures.
- Power generation industry for heat exchangers, pressure vessels, and boiler tubes.
- Water treatment industry for desalination plants, water pipelines, and wastewater treatment facilities.
Get in Touch
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