Ferdi Fittings is a trusted manufacturer and supplier of SMO 254 Buttweld Fittings in Istanbul, Turkey. SMO 254 is a high-alloy austenitic stainless steel recognized for its excellent resistance to pitting, crevice corrosion, and stress corrosion cracking. It performs particularly well in chloride-rich environments such as seawater and brine systems. Ferdi Fittings produces SMO 254 buttweld fittings, including elbows, tees, reducers, and caps, made according to ASTM/ASME standards. With high strength, great durability, and long service life, SMO 254 fittings are widely trusted in industries needing robust and corrosion-resistant piping solutions.
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 contains 19–20.5% chromium, 17.5–18.5% nickel, 6–6.5% molybdenum, 0.18–0.22% nitrogen, and iron as the balance. It has a high PREN (Pitting Resistance Equivalent Number) for strong localized corrosion resistance. Mechanical properties include tensile strength of around 650 MPa, yield strength of about 300 MPa, elongation of about 35%, and hardness of around 270 HB. SMO 254 maintains toughness at both high and low temperatures while resisting chloride-induced stress cracking. With strong weldability and durability, this alloy often outperforms many typical stainless steels in tough service 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 % |
Ferdi Fittings is a leading supplier of SMO 254 Buttweld Fittings in Istanbul, Turkey. 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 Ferdi 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 Ferdi Fittings. We offer tailored solutions to meet your specific requirements, ensuring optimal performance for your projects. For more information, please contact us at sales@ferdifittings.com.
SMO 254 Buttweld Fittings are widely used in seawater handling systems, desalination plants, and marine applications. They are also found in chemical processing plants, pulp and paper bleaching operations, and flue gas cleaning systems. Power plants and offshore oil and gas industries use SMO 254 fittings in pressure vessels, heat exchangers, and high-pressure piping systems. Thanks to their exceptional resistance to localized corrosion, these fittings provide safe, leak-proof, and durable performance in aggressive and chloride-rich environments, ensuring long-lasting service in industries needing reliability and operational efficiency.
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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