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Home > Stainless Steel > Stainless Steel 347/347H Heat Exchanger Tubing
Bosega Pipes and Tubes, based in Cape Town, South Africa, is a reliable supplier of top-notch **Stainless Steel 347/347H Heat Exchanger Tubing**, engineered to excel in high-temperature and corrosive settings. These austenitic stainless steels are stabilized with niobium (columbium) to prevent carbide precipitation and intergranular corrosion, making them perfect for continuous operation in elevated-temperature environments. Bosega guarantees that all tubing adheres to international standards, providing precision, durability, and outstanding mechanical performance for essential heat exchange applications.
Stainless Steel 347/347H Heat Exchanger Tubing primarily consists of iron, chromium (17-19%), nickel (9-12%), and niobium (10 times carbon content), enhancing its corrosion resistance and thermal stability. The mechanical properties include high tensile strength (up to 620 MPa for 347H) and excellent ductility, making it suitable for high-temperature applications. The advantages of this tubing include exceptional resistance to intergranular corrosion, stress corrosion cracking, and oxidation at elevated temperatures, making it ideal for use in heat exchangers, boilers, and other demanding environments.
Range : 10 mm OD to 50.8 mm OD
Outer Diameter : 6.00 mm to 101.60 mm
Wall Thickness : 0.70 mm to 8.00 mm
Length : up to 20 m (65.62 ft) Length & Customed Required Length
Specifications : ASTM A 213, A 268, A 269, A 789, Equivalent to ASME, EN, JIS Etc.
| Element | SS 347 | SS 347H |
| C | 0.08 max | 0.04 – 0.10 |
| Mn | 2.0 max | 2.0 max |
| Si | 1.0 max | 1.0 max |
| P | 0.045 max | 0.045 max |
| S | 0.030 max | 0.030 max |
| Cr | 17.00 – 20.00 | 17.00 – 19.00 |
| N | 10xC – 1.10 | 8xC – 1.10 |
| Ni | 9.00 – 13.00 | 9.0 -13.0 |
| Ti | 62.74 min | 63.72 min |
| Element | SS 347 | SS 347H |
| Density | 8.0 g/cm3 | 8.0 g/cm3 |
| Melting Point | 1454 °C (2650 °F) | 1454 °C (2650 °F) |
| Tensile Strength | Psi – 75000 , MPa – 515 | Psi – 75000 , MPa – 515 |
| Yield Strength (0.2%Offset) | Psi – 30000 , MPa – 205 | Psi – 30000 , MPa – 205 |
| Elongation | 35 % | 35 % |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
**Stainless Steel 347** boasts remarkable resistance to oxidation and corrosion, especially in situations with frequent thermal cycling. The inclusion of niobium enhances structural stability during welding and extended heat exposure. On the other hand, **347H**, the high-carbon variant, offers superior creep resistance and increased strength at high temperatures, making it ideal for more demanding thermal applications. With seamless construction and high-quality surface finishes, these tubes ensure optimal heat transfer efficiency while minimizing the risk of contamination in sensitive processes.
Bosega Pipes and Tubes, one of the largest suppliers of Stainless Steel 347/347H Heat Exchanger Tubing in Cape Town, South Africa, offers a comprehensive range of high-quality pipes and tubes suitable for various industrial applications. Their extensive inventory and commitment to exceptional service make them a go-to choice for stainless steel products in the region.
These tubes find extensive use in **heat exchangers**, **boilers**, **superheaters**, **chemical processing systems**, and **petroleum refineries**, where long-lasting performance under high stress and temperature is crucial. They are also utilized in **aerospace**, **power generation**, and **nuclear energy systems**, where strength, corrosion resistance, and thermal stability are vital. Stainless Steel 347/347H Heat Exchanger Tubing from Bosega guarantees consistent performance and reliability, making it the go-to choice for industries operating under extreme thermal and mechanical conditions.
| STANDARD | WERKSTOFF NR. | UNS | JIS | GOST | EN |
| SS 347 | 1.4550 | S34700 | SUS 347 | 08Ch18N12B | X6CrNiNb18-10 |
| SS 347H | 1.4878 | S34709 | SUS 347H | – | X6CrNiNb18-12 |
Stainless Steel 347/347H Heat Exchanger Tubing is widely used in various industries due to its excellent corrosion resistance and high-temperature stability. Common applications include chemical processing, petrochemical, and oil and gas industries, where resistance to intergranular corrosion is critical. This tubing is also ideal for heat exchangers, boilers, and pressure vessels operating in elevated temperatures. Its durability and reliability make it suitable for environments with harsh conditions, ensuring long-lasting performance and efficiency in heat transfer processes across multiple applications.
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