At Mitchell Stainless in Hamilton, New Zealand, we supply stainless steel piping solutions engineered for high-temperature and demanding industrial applications. Our Stainless Steel 309H Pipes are designed to maintain strength and resist oxidation under extreme heat, making them ideal for furnaces, kilns, and thermal processing systems. With a higher carbon content than standard 309, these pipes offer enhanced high-temperature strength and creep resistance. Backed by Mitchell Stainless’ commitment to quality and local expertise, 309H pipes provide reliable performance and long-term durability for projects that require robust piping solutions in challenging environments.
Stainless Steel 309H Pipes are made from an austenitic stainless steel alloy with high chromium and nickel content and increased carbon levels. This composition enhances high-temperature strength and creep resistance while maintaining excellent oxidation and scale resistance. The alloy exhibits good toughness, structural stability, and mechanical integrity under sustained heat exposure. Stainless Steel 309H remains non-magnetic in the annealed condition and is suitable for applications where prolonged high-temperature service is required.
| Thickness | 0.5mm-100mm | ||||||
| Outer diameter | 10mm, 25.4mm, 38.1mm, 50.8mm, 100mm, 250mm, 300mm, 350mm, etc | ||||||
| Length | 2000mm, 2440mm, 3000mm, 5800mm, 6000mm, etc | ||||||
| Surface | 2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, checkered, embossed, hair line, sand blast, Brush, etching, etc | ||||||
| Finish | Hot rolled (HR), Cold rolled Tube (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated) | ||||||
| Form | Round tube Square tube Rectangular tube etc. | ||||||
Grade | Ni | Mn | P | C | S | Si | Cr | Mo | N | |
309H | min. | 8.0 | – | – | – | – | – | 18.0 | – | – |
max. | 10.5 | 2.0 | 0.045 | 0.08 | 0.030 | 0.75 | 20.0 | |||
Grade | Tensile Strength (MPa) min | Elongation (% in 50mm) min | Yield Strength 0.2% Proof (MPa) min | Hardness | |
Rockwell B (HR B) max | Brinell (HB) max | ||||
309H | 515 | 40 | 205 | 92 | 201 |
Contact us to get a quick quote for your requirement.
high-quality Stainless Steel 309H Pipes We tested to make sure durability and strength. Their pipes undergo high-quality tests; mechanical analysis is done and chemicals are checked and tested in full compliance with industries. The respective certificates of conformity are issued against every product for full compliance with reliability criteria for its quality and performance.
Stainless 309H Square Pipes are square-shaped pipes made from 309H stainless steel, offering high-temperature resistance, durability, and corrosion resistance, ideal for structural and high-heat applications.
SS 309H Seamless Pipes are pipes made from 309H stainless steel without welded seams, providing superior strength, high-temperature resistance, and excellent durability for demanding industrial and high-heat applications.
Stainless Steel 309H ERW Pipes are electric resistance welded pipes made from 309H stainless steel, known for high-temperature resistance and durability, used in various industrial and heat-intensive applications.
SS 309H LSAW Pipes are longitudinally submerged arc welded pipes made from 309H stainless steel, offering high heat resistance and strength, suitable for high-pressure and high-temperature industrial applications.
Stainless Steel 309H Round Pipes are cylindrical pipes made from 309H stainless steel, providing excellent heat resistance, durability, and corrosion resistance, ideal for high-temperature and industrial applications.
Stainless Steel 309H Welded Pipes are made from 309H stainless steel, joined by welding. They offer high-temperature resistance, durability, and strength, suitable for various industrial and high-heat applications.
Stainless Steel 309H Pipes are widely used in high-temperature industrial applications. Typical uses include furnaces, kilns, heat exchangers, boilers, thermal processing equipment, and petrochemical plants. They are also suitable for power generation facilities and other systems exposed to sustained heat and thermal cycling. At Mitchell Stainless, we often supply 309H pipes for projects that demand reliable performance and durability under extreme conditions. Their high-temperature strength and oxidation resistance make them a trusted solution for industries where piping failure is not an option.
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