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Stainless Steel 347 Pipe Fittings are specially designed components made from stabilized austenitic stainless steel, offering remarkable resistance to intergranular corrosion, particularly after welding or when exposed to high temperatures. With the addition of columbium (niobium) and tantalum, SS 347 boasts enhanced stability and effectively prevents carbide precipitation during welding. This makes it a fantastic choice for applications that experience repeated thermal cycles or stress. These pipe fittings play a crucial role in connecting, controlling, or redirecting fluid flow in systems that require both corrosion resistance and structural integrity at elevated temperatures, ensuring they last long and perform reliably in tough environments.
The chemical makeup of Stainless Steel 347 consists of 17–19% chromium, 9–13% nickel, and columbium/tantalum for stabilization against carbide formation. It has a maximum carbon content of 0.08%, which, along with the stabilizing elements, boosts its resistance to sensitization. SS 347 features a tensile strength of around 515 MPa and a yield strength of about 205 MPa, along with excellent elongation and good creep resistance at temperatures reaching up to 870°C (1600°F). These mechanical properties, combined with its good formability and weldability, make SS 347 a robust and versatile choice for high-temperature and corrosive fluid-handling systems.
| Grades | 201, 202, 304, 304L, 304H, 309S, 309H, 310S, 310H, 316, 316TI, 316H, 316L, 316LN, 317, 317L, 321, 321H, 347, 347H, 904L |
| Type | Seamless / Welded / Fabricated |
| Bending Radius | R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom |
| Size | ½”NB to 48″NB in |
| Schedule | Sch 10s, 40s, 80s, 160s, XXS. |
| Dimensions | ANSI/ASME B16.9, B16.28, MSS-SP-43. |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| SS 347 | 0.10 max | 2.0 max | 0.75 max | 0.045 max | 0.03 max | 18 – 20 | – | 8 – 10.5 | – |
| Density | 8.0 g/cm3 |
| Melting Point | 1400 °C (2550 °F) |
| Tensile Strength | Psi – 75000 , MPa – 515 |
| Yield Strength (0.2%Offset) | Psi – 30000 , MPa – 205 |
| Elongation | 35 % |
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We ensures the highest standards for stainless steel 347 pipe fittings through rigorous testing and certification. Each component undergoes detailed inspection, including dimensional testing, mechanical testing and corrosion resistance assessment. Our fittings are certified according to international standards, ensuring reliability, durability and efficiency for a variety of industrial applications.
Stainless Steel 347 pipe fittings are corrosion-resistant components designed for high-temperature applications. They offer excellent resistance to intergranular corrosion and maintain strength in harsh environments, ensuring durable, reliable connections.
SS 347 butt weld pipe fittings are corrosion-resistant components used to join pipes with seamless, strong connections. They excel in high-temperature and aggressive environments, ensuring durability and reliability in demanding applications.
SS 347 socket weld pipe fittings are corrosion-resistant components designed for secure, leak-proof connections. They are ideal for high-pressure applications, offering durability and reliability in high-temperature and aggressive environments.
Stainless Steel 347 seamless fittings are high-strength, corrosion-resistant components crafted without joints. They ensure robust, leak-proof connections in high-temperature and harsh environments, providing long-lasting durability and performance.
SS 347 cross pipe fittings are corrosion-resistant components designed to connect four pipes at a central junction. They provide strong, reliable connections in high-temperature and aggressive environments, ensuring durability.
Stainless Steel 347 tee fittings are corrosion-resistant components used to connect three pipes at a right angle. They offer strong, reliable connections in high-temperature and harsh environments, ensuring durability.
You’ll find Stainless Steel 347 Pipe Fittings commonly used in various applications, including petrochemical processing, refineries, power generation, heat exchangers, and aerospace systems. They are particularly well-suited for high-temperature piping in exhaust systems, boiler components, and chemical processing lines where they face constant heat and corrosive agents. Their ability to resist intergranular corrosion after welding makes them perfect for pressure systems, flanged connections, and piping installations where thermal stability and corrosion resistance are vital for maintaining safety and performance.
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