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Home > Stainless Steel > Stainless Steel 347 and 347H Welded Tubing
Operating from the heart of Naypyidaw, Tun Pipes has established itself as a trusted source for industrial materials, with a particular strength in high-performance stainless steel tubing. We understand that demanding applications require reliable components, which is why our Stainless Steel 347/347H Welded Tubing is manufactured to the most exacting standards, offering a dependable solution for critical environments across Myanmar.
What makes this tubing so resilient is its specific composition. The addition of columbium (niobium) acts as a stabilizer, making it highly resistant to sensitization and intergranular corrosion following welding or exposure to high temperatures. This gives the material excellent strength and oxidation resistance, even when operating in the intense heat of service environments up to around 1500°F, ensuring long-term structural integrity.
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 Tun 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.
Tun Pipes and Tubes is the largest supplier of Stainless Steel 317 and 317L Welded Tubing in Naypyidaw, Myanmar. 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, Tun 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@tunpipes.com.
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.
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