- sales@blundellpipes.co.nz
- Hamilton, New Zealand
Home > Stainless Steel > Stainless Steel 347 and 347H Welded Tubing
Blundell Pipes and Tubes, located in Hamilton, New Zealand, is a reputable manufacturer and supplier of top-notch Stainless Steel 347 and 347H Welded Tubing. Renowned for their precision engineering and reliable performance, the company produces welded tubing that boasts remarkable resistance to intergranular corrosion and impressive strength at high temperatures. By employing cutting-edge manufacturing techniques and strict quality control measures, Blundell Pipes and Tubes guarantees that each product adheres to international standards. These tubing grades are perfect for industries that demand durable, heat-resistant, and corrosion-resistant solutions, such as petrochemical, aerospace, power generation, and chemical processing, ensuring dependable performance even in challenging environments.
Stainless Steel 347 and 347H Welded Tubing are niobium-stabilized austenitic stainless steels containing 17–20% chromium and 9–13% nickel. Grade 347 is heat-treated to prevent intergranular corrosion when being welded and exposed to high temperatures, while 347H has a higher carbon level up to 0.10% to improve creep strength and mechanical properties at high temperatures. The welded tubes provide tensile strength of 515–750 MPa and yield strength of approximately 205 MPa. They exhibit superior oxidation resistance and heat stability to 900°C with maintaining excellent weldability and formability.
Welded Tubes Size : 1 / 8″ NB – 24″ NB
Specifications : ASTM A/ASME SA213, A249, A269, A312, A358
Standard : ASTM, ASME and API
Length : Single Random, Double Random & Required Length
Outer Diameter : 6.00 mm OD up to 914.4 mm OD, Sizes up to 24” NB
Thickness : 0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS
Schedule : SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Types : Welded
Form : Round Tubes, Square Tubes, Rectangular Tubes, Coiled Tubes, “U” Shape, Pan Cake Coils, Hydraulic Tubes
End : Plain End, Beveled End, Treaded
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Choose Stainless Steel 347 and 347H Welded Tubing from Blundell Pipes and Tubes for exceptional corrosion resistance, superior strength and excellent durability. Ideal for a variety of industrial applications it provides outstanding performance in harsh environments. With precision manufacturing and quality assurance, we ensure reliable and durable tubing solutions.
Stainless Steel 347 and 347H Welded Tubing primarily consists of iron, chromium, nickel, and niobium, with a controlled carbon content—higher in 347H—to boost high-temperature strength. The addition of niobium stabilizes the steel, preventing the formation of chromium carbide and enhancing resistance to intergranular corrosion. Mechanically, these tubing grades showcase excellent tensile and yield strength, high toughness, and superior creep resistance at elevated temperatures. They also offer outstanding weldability, thermal stability, and oxidation resistance, making them ideal for demanding industrial applications that require long-lasting durability under heat and pressure.
| STANDARD | WERKSTOFF NR. | UNS | JIS | GOST | EN |
| SS 347 | 1.4550 | S34700 | SUS 347 | 08Ch18N12B | X6CrNiNb18-10 |
| SS 347H | 1.4961 | S34709 | SUS 347H | – | X6CrNiNb18-12 |
Stainless Steel 347 and 347H Welded Tubing find extensive use in applications that necessitate high-temperature stability and corrosion resistance. They’re commonly found in boilers, heat exchangers, superheaters, and chemical processing equipment. The petrochemical and power generation sectors depend on these tubing grades for steam lines and furnace components. Additionally, they are utilized in aerospace, marine, and automotive applications, where reliability and performance are crucial.
Stainless Steel 347 and 347H Welded Tubing finds wide application in heat exchangers, boilers, superheaters, pressure vessels, and exhaust systems where resistance to stress rupture and thermal fatigue is critical. Grade 347 is used in welded applications where precipitation of carbides should be avoided, whereas 347H is designed for systems subjected to long-term high-temperature service. These welded tubes prove to be a suitable option for corrosive and pressure applications with a reliable solution under long service periods where durability, heat resistance, and structural integrity are called for.
©2024 Blundell Pipes and Tubes . All Rights Reserved.
