310S pipe is a low-carbon version of the standard 310 stainless steel grade, specifically designed for continuous high-temperature service where prolonged exposure to elevated temperatures is required. The lower carbon content (0.08% maximum compared to 0.25% for standard 310) provides improved weldability and reduces the risk of carbide precipitation during welding or sustained high-temperature operation.

Like its standard 310 counterpart, 310S contains high levels of chromium (24-26%) and nickel (19-22%), delivering exceptional oxidation resistance and good creep strength at temperatures up to 1050°C (1922°F) for continuous service. The high chromium content forms a protective oxide layer that prevents scaling, while the nickel content maintains austenitic stability and resistance to carburization.

UNS S31008 is the standard designation for this grade, and ASTM A312 is the governing specification for seamless and welded austenitic stainless steel pipe. This grade is particularly well-suited for applications involving sustained high temperatures where standard 310 might experience sensitization, or where welding is required during fabrication or installation.

The low-carbon design of 310S makes it the preferred choice for equipment that operates continuously in the 800-1000°C range, such as furnace components, heat treat fixtures, and high-temperature process piping. While its strength at extreme temperatures is slightly lower than standard 310 due to the reduced carbon content, the improved weldability and resistance to intergranular corrosion make 310S the more practical choice for most fabricated assemblies.

The low carbon content of 310S distinguishes it from standard 310 and provides superior weldability.

Comparison of carbon content:

310S pipe delivers the following mechanical properties in the solution annealed condition:

High-Temperature Tensile Strength (Typical values at elevated temperatures for 310S):

Seamless Pipe
Produced from solid billets through hot extrusion or cold drawing. Seamless construction provides uniform wall thickness and strength, making it ideal for high-temperature pressure applications.

Welded Pipe
Formed from 310S coils and longitudinally welded using ERW or EFW processes. Welded pipe offers cost advantages for larger diameters and is suitable for many furnace and ducting applications.

310S pipe is specified for continuous high-temperature service across multiple industries where oxidation resistance and weldability are critical.

• Radiant tubes and furnace rolls

• Retorts, muffles, and burner nozzles

• Heat treat fixtures and baskets

• Annealing and brazing furnace components

The low carbon content prevents carbide precipitation during continuous operation, maintaining ductility and corrosion resistance over extended periods.

• Catalytic reformer and cracking furnace tubes

• Pyrolysis tubes in ethylene plants

• Hydrogen reformer piping

• Heat exchanger tubes for high-temperature process gases

310S resists carburization and sulfidation in hydrocarbon and hydrogen-rich atmospheres.

• Superheater and reheater tubes

• High-temperature steam piping

• Gas turbine exhaust components

• Waste-to-energy plant boiler tubing

• Preheater cyclones and ducts

• Rotary kiln components

• Clinker cooler ducting

• Lime kiln preheaters

• High-temperature oven liners

• Air heater tubes

• Thermal oxidizer components

• Diesel particulate filter housings

• Exhaust gas recirculation coolers

• Turbocharger housings

For inquiries, technical data sheets, or a quotation for 310S stainless steel pipe (ASTM A312 TP310S / UNS S31008) for continuous high-temperature applications, please contact our sales team.

We provide:

• Mill test certificates with full traceability

• Low-carbon grade ensuring excellent weldability

• Competitive pricing for project quantities

• On-time delivery to global destinations

• Technical support from material selection to installation

We respond to all inquiries within 24 hours.