Home > Stainless Steel > Stainless Steel 347 and 347H Seamless Pipes
Tun Pipes, based in Naypyidaw, Myanmar, is a trusted name for quality and reliability in industrial supplies. We take pride in being your local partner for premium Stainless Steel 347/347H Seamless Pipes. Our commitment is to ensure that our clients receive products that meet the highest standards of durability and performance. From major construction projects to specialized industrial applications, we provide robust piping solutions you can count on, backed by our expert service and deep understanding of the regional market. We’re here to support your endeavors with quality materials.
The composition of Stainless Steel 347/347H includes chromium and nickel, with a crucial addition of niobium, which provides exceptional resistance against corrosion. Mechanically, these seamless pipes are very strong, maintaining their structural integrity under high temperatures and intense pressure. This combination of a stable chemical makeup and impressive mechanical strength makes them a highly reliable choice. They are specifically designed to perform reliably in challenging environments where other materials might fail, ensuring long-term safety and durability for critical applications.
Range : 6NB to 1200NB
Outer Diameter : 1/8″ NPS to 12″ NPS
Thickness : 0.6 mm to 12.7 mm
Schedules : SCH. 5, 10, 20, 30, 40, 60, 80, 100, 120, 140, 160, XXS.
Length : Single Random, Double Random & Cut Length
Specifications : ASTM A312 / ASTM SA312
Types : Round, Square, Rectangle, Hydraulic, Honed Tubes
End : Plain End, Beveled End
| STANDARD | UNS | WERKSTOFF NR. |
| SS 347 | S34700 | 1.4550 |
| SS 347H | S34709 | 1.4961 |
| Ni | 09 – 13 | 09 – 13 |
| N | – | – |
| Cr | 17 – 20 | 17 – 19 |
| C | 0.08 max | 0.04 – 0.08 |
| Si | 1 max | 0.75 max |
| Mn | 2 max | 2 max |
| P | 0.045 max | 0.045 max |
| S | 0.030 max | 0.03 max |
| OTHER | Nb=10(C+N) – 1.0 | 8xC min – 1.00 max |
| Grade | 347 / 347H |
| Tensile Strength (MPa) min | 515 |
| Yield Strength 0.2% Proof (MPa) min | 205 |
| Elongation (% in 50mm) min | 40 |
| Hardness | |
| Rockwell B (HR B) max | 92 |
| Brinell (HB) max | 201 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Choosing Stainless Steel 347and 347H Seamless Pipes from Tun Pipes and Tubes guarantees exceptional corrosion resistance and high temperature performance. Their pipes are manufactured to exacting standards, ensuring reliability and durability for complex applications. With a focus on customer service, Tun offers customized solutions and technical support. In addition, the rugged design reduces leakage, making it reliable for a variety of applications.
Tun Pipes and Tubes, one of the largest suppliers of Stainless Steel 347 and 347H Seamless Pipes in Naypyidaw, Myanmar, 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.
| Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
| BS | En | No | Name | ||||
| 347 | S34700 | 347s31 | 58G | 1.4550 | X6CrNiNb18-10 | 2338 | SUS 347 |
Yes, we offer custom sizes for Stainless Steel 347and 347H Seamless Pipes to meet your specific requirements. Our team at Tun Pipes and Tubes is committed to providing tailored solutions for all your Piping & tubing needs. For more details, contact us at sales@tunpipes.com.
These Stainless Steel 347 and 347H Seamless Pipes find extensive use in boilers, heat exchangers, pressure vessels, and piping systems that operate at elevated temperatures. They are also essential in petrochemical and chemical plants, power generation facilities, and oil & gas operations where high-temperature corrosion resistance is crucial. Additionally, they are perfect for furnace components, industrial ovens, and high-temperature process piping that demand long-lasting strength and durability. Their blend of mechanical strength and high-temperature resistance makes them a go-to choice for many industrial applications.
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