Home > Pipe Fittings > Stainless Steel 309S Pipe Fittings
Mitchell Stainless, a trusted manufacturer and supplier in Hamilton, New Zealand, offers premium Stainless Steel 309S pipe fittings engineered for high-temperature and corrosion-resistant applications. 309S is an austenitic stainless steel with elevated chromium and nickel content, providing excellent oxidation resistance, scaling resistance, and durability at extreme temperatures. Mitchell Stainless ensures each pipe fitting meets stringent quality standards, delivering smooth finishes, precise dimensions, and consistent mechanical performance. These fittings are ideal for industrial, chemical, and power generation piping systems where high-temperature strength, corrosion resistance, and long-term reliability are critical.
Stainless Steel 309S pipe fittings are composed primarily of iron, with 23–25% chromium, 12–15% nickel, and small amounts of manganese, silicon, and carbon. The low carbon content of 309S minimizes carbide precipitation and enhances corrosion resistance after welding. Chromium provides excellent oxidation and scaling resistance at high temperatures, while nickel contributes to toughness and mechanical stability. This composition ensures 309S pipe fittings maintain high-temperature performance, structural integrity, and durability in industrial environments exposed to thermal and oxidative stresses.
| 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 309S | 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 % |
Contact us to get a quick quote for your requirement.
We provides some of the excellent quality pipe fittings in stainless steel 309S through testing and certification. In fact, each one of the offered products undergoes comprehensive tests based on chemical composition analysis, evaluation of mechanical property, and Non-Destructive Testing (NDT). Provided certificates for all international standards from ASTM to ISO.
Stainless Steel 309S pipe fittings are high-temperature-resistant components known for their exceptional strength and oxidation resistance. Ideal for extreme heat environments, they are used in various industrial and aerospace applications.
SS 309S Butt Weld pipe fittings are high-temperature-resistant components used to join pipes through welding. Made from stainless steel 309S, they offer excellent strength, durability, and resistance to oxidation.
SS 309S Socket Weld pipe fittings are robust components used to connect pipes via a socket weld. Made from stainless steel 309S, they provide excellent heat resistance, strength, and corrosion durability.
Stainless Steel 309S seamless fittings are high-temperature-resistant components without welds, offering superior strength, oxidation resistance, and durability. They are ideal for demanding industrial applications and extreme heat environments.
SS 309S cross pipe fittings are durable components that connect four pipes at a junction. Made from stainless steel 309S, they offer excellent heat resistance, strength, and corrosion durability.
Stainless Steel 309S tee fittings create a T-junction by connecting three pipes. Made from stainless steel 309S, they provide exceptional heat resistance, strength, and corrosion resistance for industrial applications.
Stainless Steel 309S pipe fittings are widely used in boilers, furnaces, heat exchangers, high-temperature piping systems, and chemical processing equipment where strength and oxidation resistance are critical. Typical applications include elbows, tees, reducers, flanges, and couplings in high-temperature and corrosive industrial environments. They are also used in maintenance and repair projects requiring durable, corrosion-resistant, and heat-stable piping components. In New Zealand’s industrial and fabrication sectors, 309S pipe fittings are valued for producing reliable, long-lasting assemblies that withstand high temperatures, mechanical stress, and oxidative conditions, ensuring safety and performance in demanding applications.
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