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Home > Stainless Steel > Stainless Steel 347 and 347H Welded Tubing
Bosega Pipes and Tubes stands out as a top-notch manufacturer and supplier of Stainless Steel 347 and 347H Welded Tubing right in Cape Town, South Africa. They specialize in delivering high-quality tubing solutions that are expertly designed for outstanding performance in high-temperature settings and exceptional corrosion resistance. The Stainless Steel 347 and 347H grades are austenitic and stabilized with niobium, which helps to prevent intergranular corrosion during welding while ensuring mechanical strength even at elevated temperatures. Bosega takes pride in their precision welding, smooth surfaces, and consistent wall thickness, providing tubing that not only meets international standards but also performs reliably across various applications, including power generation, chemical processing, marine, and other industrial high-temperature environments.
When it comes to composition, Stainless Steel 347 Welded Tubing is mainly made up of iron, chromium (17–19%), nickel (9–13%), niobium, along with trace amounts of carbon, manganese, and silicon. On the other hand, Stainless Steel 347H has a slightly higher carbon content (0.04–0.10%), which enhances its creep resistance at high temperatures. The niobium stabilization plays a crucial role in preventing carbide precipitation during welding or thermal service, boosting resistance to intergranular corrosion. Both grades are mechanically robust, offering high tensile and yield strength, excellent toughness, and remarkable resistance to stress corrosion cracking, ensuring they maintain their structural integrity even in harsh, high-temperature, and corrosive environments.
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 Bosega 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.
Bosega Pipes and Tubes is the largest supplier of Stainless Steel 317 and 317L Welded Tubing in Cape Town, South Africa. Known for its high-quality products. We offer superior corrosion resistance, strength, and durability. Trusted by industries worldwide they provide reliable precision-engineered tubing for various applications and project needs.
| 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 |
Yes, Bosega Pipes and Tubes offer large custom designs for Stainless Steel 347 and 347H Welded Tubing. With design, wall thickness and length. Their adjustable options ensure the tubing meets specific application requirements. This flexibility makes it more efficient and reliable for different industries and environments. For more details, contact us at sales@bosegapipes.co.za.
You’ll find Stainless Steel 347 and 347H Welded Tubing commonly used in boilers, heat exchangers, superheaters, chemical processing equipment, and furnace systems. They’re particularly well-suited for power plants, petrochemical industries, marine applications, and refineries where high-temperature strength, creep resistance, and corrosion resistance are essential. Thanks to their precision welding, thermal stability, and durability, these tubes promise a long service life, dependable performance, and minimal maintenance, even in the most demanding industrial conditions.
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