About UNS S31254 Seamless and Welded Pipe (254 SMO, 1.4547, 254SMO)
UNS S31254, also known as Alloy 6Mo, WNR 1.4547, F44, or 254SMO, is a high-performance super austenitic Stainless Steel designed for extreme corrosion resistance. It excels in harsh environments such as high-temperature seawater, chemical processing, and flue gas desulfurization systems.
We offer a wide range of seamless and welded stainless steel pipes made from premium-grade UNS S31254. These pipes are ideal for use in seawater treatment, desalination plants, and other demanding industrial applications. Manufactured to the highest standards, they ensure durability, reliability, and long-term performance in even the most challenging conditions.
Key features of UNS S31254 Stainless Steel Pipe include:
- High Corrosion Resistance: Exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking, especially in chloride-rich environments.
- High Strength: Offers superior mechanical strength, making it suitable for high-pressure and high-temperature applications.
- Excellent Weldability: Easy to weld and fabricate, allowing for flexible installation in complex piping systems.
- Compliance with Industry Standards: Meets ASTM A269, ASTM A312, and ASTM A213 standards, ensuring quality and consistency across all products.
The manufacturing process begins with melting the raw material in an electric arc furnace. The steel is then refined using an argon-oxygen decarburization (AOD) process to remove impurities like carbon and sulfur. After refining, the molten metal is cast into a billet and subsequently hot-rolled into tubes, ensuring consistent quality and structural integrity.
SMO 254 Seamless Pipe Specifications
| Specifications | ASTM A 409 / ASME SA 409, ASTM A 312 / ASME SA 312, ASTM A 358 / ASME SA 358 |
| Dimensions | ASTM, ASME, API |
| Size | 1/2" – 48" |
| Specialized in | Large Diameter Sizes |
| Thickness | 20 SWG, 18 SWG, 16 SWG, 14 SWG, 12 SWG, 10 SWG, Sch. 10, Sch. 40, Sch. 80, etc. |
| Type | Seamless, ERW, Welded, Fabricated |
| Form | Round, Hydraulic, etc. |
| Length | Single Random, Double Random, Cut Length |
| End | Plain End, Beveled End, Threaded |
SMO 254 Pipe Chemical Composition
| SMO 254 | Ni | C | Mo | Mn | Si | Fe | Cu | S | P | Cr |
| 17.5 – 18.5 | 0.02 max | 6 – 6.5 | 1 max | 0.8 max | – | 0.5 – 1 | 0.01 max | 0.03 max | 19.5 – 20.5 |
SMO 254 Pipe Mechanical Properties
| Density | Melting Point | Yield Strength (0.2% Offset) | Tensile Strength | Elongation |
| 8.0 g/cm³ | 1320–1390 ℃ | 300 MPa | 650 MPa | 35% |
Equivalent Grades for 254 SMO Pipe
| STANDARD | UNS | WERKSTOFF NR. | AFNOR | EN | JIS | SIS | GOST |
| SMO 254 | S31254 | 1.4547 | Z1 CNDU 20.18.06Az | X1CrNiMoCuN20-18-7 | – | 2378 | – |
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Suzhou Yuhaoxuan Electromechanical Co., Ltd , https://www.essiont-pipeline.com