At Mitchell Stainless in Hamilton, New Zealand, we supply stainless steel tubing engineered for high-temperature and demanding industrial applications. Our Stainless Steel 309H Tubing features higher carbon content than 309S, offering enhanced tensile strength and creep resistance at elevated temperatures while retaining excellent oxidation and corrosion resistance. Ideal for furnaces, kilns, heat exchangers, and thermal processing systems, these tubes provide reliable performance and structural integrity under extreme heat. Supported by Mitchell Stainless’ commitment to quality and local expertise, 309H tubing is a trusted solution for projects requiring high-temperature durability and mechanical reliability.
Stainless Steel 309H Tubing is manufactured from a high-chromium, high-nickel austenitic stainless steel alloy with elevated carbon content. The higher carbon improves tensile strength and creep resistance under high-temperature service, while maintaining excellent corrosion and oxidation resistance. The tubing offers superior toughness, dimensional stability, and mechanical performance during prolonged heat exposure. Stainless Steel 309H retains structural integrity and consistent mechanical properties in continuous high-temperature environments, making it ideal for industrial, chemical, and thermal processing applications requiring strength, heat resistance, and reliability.
Tube Specifications: ASTM A213, A269, A249, A511, A554 / ASME SA213, SA269, SA249, SA511, SA554
Dimensions: ANSI B36.19, ANSI B36.10
Pipe Outside Diameter: 6.00 mm OD up to 914.4 mm OD, Sizes up to 24″ NB available Ex-stock, OD Size Steel Tubes available Ex-stock
Tube Outside Diameter: 1/8″ OD TO 2″OD 3MM OD TO 38 MM OD
Thickness Range: 1MM TO 3 MM 0.028 TO 0.156 IN, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS
Type: Seamless / ERW / Welded / Capillary Tubes
Form: Round Tube, Square Tube, Rectangular Tube
Length: Single Random, Double Random & Required Length
End: Plain End, Beveled End, Treaded
End Protection: Plastic Caps
Finish: Annealed and Pickled, Polished, Bright Annealed, Cold Drawn
External Coating: 3LPE / 3LPP/ FBE/ DFBE/ PP
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1400 °C (2550 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
Contact us to get a quick quote for your requirement.
We offers thorough testing and certification of stainless steel 309H tubing, ensuring high performance and reliability. Our products undergo rigorous testing, including mechanical, chemical and theoretical analysis. Each batch is certified by relevant test reports, meets industry standards and customer specifications for durability, strength and corrosion resistance.
Available in sizes ranging from 1/8″ to 12″ in outer diameter, these tubes are highly corrosion-resistant. Seamless construction ensures strength and durability under high temperatures and pressures.
These tubes, with outer diameters from 1/8″ to 24″, offer excellent corrosion resistance. Welded for precise applications, they are suitable for a variety of industrial uses
Typically sized between 1/8″ and 2″ in outer diameter, this tubing is corrosion-resistant and designed to withstand high temperatures. Ideal for efficient heat transfer in industrial systems.
Available in sizes from 1/16″ to 2″ in outer diameter, it boasts high corrosion resistance. Perfect for critical instrumentation applications requiring precision and reliability.
Ranging from 1/2″ to 5″ in outer diameter, these corrosion-resistant tubes can endure extreme temperatures. Essential for maintaining efficiency in boiler operations.
These tubes come in various sizes, typically up to 2″ in outer diameter, and offer excellent corrosion resistance. They are used in heat exchangers and condensers for efficient thermal management.
With sizes usually between 1/4″ and 2″ in outer diameter, this corrosion-resistant tubing is designed for condensing steam or other fluids. It ensures efficient thermal exchange in condensers.
Available in sizes from 1/2″ to 2″ in outer diameter, these corrosion-resistant tubes feature fins for enhanced heat transfer. Used in heat exchangers to improve efficiency and performance.
Stainless Steel 309H Tubing is commonly used in high-temperature industrial applications. Typical uses include furnace and kiln components, heat exchangers, boilers, thermal processing equipment, and petrochemical plant assemblies. They are also suitable for power generation systems, industrial burners, and machinery exposed to sustained elevated temperatures. At Mitchell Stainless, we supply 309H tubing for projects that require long-term durability, mechanical strength, and corrosion resistance under extreme heat conditions. Its combination of high-temperature performance, toughness, and structural stability makes it a trusted solution for industrial, chemical, and thermal engineering applications.
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