Nguyen Fittings and Plates is a reliable manufacturer and supplier of SMO 254 Buttweld Fittings, located in Da Nang, Vietnam. Known for its superior engineering and prompt service, the company provides corrosion-resistant and high-strength fittings complying with international standards. With state-of-the-art manufacturing facilities and emphasis on durability and accuracy, Nguyen Fittings and Plates serves the chemical processing industry, offshore oil and gas, desalination, and pulp and paper industry. Their SMO 254 Buttweld Fittings are suited for applications in the most aggressive and chlorides-containing environment and are designed to provide long-term performance with low maintenance.
Specifications : ASTM A403 / ASME SA403
Dimensions : ASME/ANSI B16.9, ASME B16.28, MSS-SP-43
Size : 3/4″ – 12″
Type : Seamless / Welded / Fabricated
Schedule : Sch 5 TO Sch XXS.
Thickness : 20 Swg., 18 Swg., 16 Swg., 14 Swg., 12 Swg., 10 Swg., & Sch. 10, Sch. 40, Sch. 80 etc.
SMO 254 Buttweld Fittings are produced using a high-alloy austenitic stainless steel with high amounts of molybdenum (6%), chromium, and nitrogen. This gives it superior pitting, crevice corrosion, and stress corrosion cracking resistance, particularly in seawater and halide-contaminated environments. The fittings are mechanically strong with tensile strength of about 650 MPa and yield strength of about 300 MPa. They are also ductile and tough. The excellent alloy composition allows for outstanding corrosion resistance even in acidic as well as chlorides-intensive environments, making them perfect for severely corrosive applications.
| Grade | % | Ni | Cr | Mo | Cu | N | C | Mn | Si | P | S |
| SMO 254 | Min. | 17.5 | 19.5 | 6 | 0.5 | 0.18 | |||||
| Max. | 18.5 | 20.5 | 6.5 | 1 | 0.22 | 0.02 | 1 | 0.8 | 0.03 | 0.01 |
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| SMO 254 | 8.0 g/cm3 | 1320-1390 ℃ | 650 | 300 | 35 % |
Nguyen Fittings is a leading supplier of SMO 254 Buttweld Fittings in Da Nang, Vietnam. We offer an extensive range of SMO 254 Buttweld Fittings, renowned for their excellent corrosion resistance and high strength, which makes them perfect for demanding industrial applications like chemical processing, marine environments, and high-temperature systems. With a commitment to quality and reliable delivery, we ensure our clients receive top-tier products tailored to meet the specific needs of various industries.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
| STANDARD | WERKSTOFF NR. | UNS | JIS | SIS | GOST | AFNOR | EN |
| SMO 254 | 1.4547 | S31254 | – | 2378 | – | Z1 CNDU 20.18.06Az | X1CrNiMoCuN20-18-7 |
SMO 254 Buttweld Fittingsfrom Nguyen Fittings offer exceptional corrosion resistance, especially in seawater and harsh environments. They are known for their high strength, durability, and resistance to pitting and crevice corrosion, ensuring long-lasting performance. We provide precise manufacturing, quality control, and reliable service for diverse industrial applications.
SMO 254 Buttweld Fittings provide excellent resistance to pitting, crack corrosion, and stress corrosion cracking, making them ideal for harsh environments such as chemical, marine and offshore applications. These materials also provide excellent weldability and formability, resulting in reliable and durable connections. SMO 254’s ability to withstand extreme temperature and pressure fluctuations adds great versatility under challenging industrial conditions. Its overall durability and reliability reduce maintenance and replacement costs.
All dimensions given in inches for common diameters and wall thicknesses. Dimensions in accordance with ASME B16.9. Other sizes, schedules and wall thicknesses also available. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Yes, custom sizes for SMO 254 Buttweld Fittings are available at Nguyen Fittings. We offer tailored solutions to meet your specific requirements, ensuring optimal performance for your projects. For more information, please contact us at sales@nguyenfittings.com.
SMO 254 Buttweld Fittings are utilized in severe industrial applications where they must withstand harsh chlorides, seawater, and aggressive chemicals. Representative industries are offshore oil and gas platforms, seawater cooling systems, desalination plants, chemical tankers, heat exchangers, and pulp and paper mills. These fittings are also used in flue gas desulfurization and marine applications where standard stainless steels do not perform. Their capability of resistance to high pressure, temperature, and corrosion makes them a choice for critical piping systems demanding long service life, structural integrity, and low maintenance.
Get in touch with one of our Technical Sales Representatives to request a quote or get answers to any questions you may have.








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