SMO 254 Buttweld Fittings are top-notch, corrosion-resistant components crafted for critical piping systems that operate in extremely harsh environments. Made by reputable suppliers like Devang Fittings in Kolkata, India, these fittings are specifically built to endure severe chloride-rich conditions and high temperatures. Their remarkable resistance to pitting, crevice corrosion, and stress corrosion cracking makes them a go-to choice for offshore, marine, and chemical processing applications.
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 is a super austenitic stainless steel, boasting a composition of about 20% chromium, 18% nickel, 6% molybdenum, along with enhanced nitrogen and copper content. This advanced alloy chemistry gives SMO 254 a high Pitting Resistance Equivalent Number (PREN) exceeding 42.5, showcasing its superior resistance in halide-rich environments. It offers a tensile strength of around 650 MPa, a yield strength of about 300 MPa, and outstanding ductility, weldability, and thermal stability even under extreme operating conditions.
| 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 % |
Devang Fittings is a leading supplier of SMO 254 Buttweld Fittings in Kolkata, India. 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 Devang 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.
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 Devang Fittings. We offer tailored solutions to meet your specific requirements, ensuring optimal performance for your projects. For more information, please contact us at sales@devangfittings.co.in.
You’ll find SMO 254 Buttweld Fittings commonly used in desalination plants, heat exchangers, pulp and paper bleaching systems, chemical tankers, and flue gas cleaning systems. Their smooth interior surface, high mechanical strength, and exceptional corrosion resistance make them perfect for transporting fluids under high pressure and temperature. These fittings guarantee a long service life and reliability in situations where standard stainless steels or duplex grades would quickly fail, providing a cost-effective and low-maintenance solution in tough industrial settings.
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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