- sales@davidpipes.com
- Canberra, Australia
Home > Stainless Steel >Stainless Steel 347 and 347H Instrumentation Tubing
David Pipes and Tubes is a reliable manufacturer and supplier of stainless steel 347/347H instrumentation tubing, proudly based in Canberra, Australia. They specialize in crafting high-quality tubing solutions that are designed for precision applications, offering exceptional corrosion resistance, high-temperature stability, and precise dimensional accuracy. The stainless steel 347/347H instrumentation tubing is stabilized with niobium, which helps prevent carbide precipitation during welding or extended heat exposure, ensuring that the tubing remains durable and performs reliably even in harsh environments. With a commitment to precise manufacturing and strict adherence to international standards, David Pipes and Tubes provides both seamless and welded 347/347H instrumentation tubing, perfect for use in chemical processing, petrochemical, power generation, and instrumentation systems.
This tubing is made up of chromium (17–19%), nickel (9–13%), and niobium (0.5–1.0%), with the 347H variant featuring a higher carbon content to enhance its strength at elevated temperatures. It boasts impressive mechanical properties, including a tensile strength of 515–700 MPa, yield strength of 205–275 MPa, elongation of 35–40%, and a hardness rating below 90 HRB. These alloying elements and mechanical characteristics provide outstanding resistance to oxidation, intergranular corrosion, and creep at high temperatures, ensuring that the tubing maintains its structural integrity and long-lasting performance in demanding industrial settings.
| Grade | Range | Ni | C | Cr | Mn | Si | P | S |
|---|---|---|---|---|---|---|---|---|
| 347 | Min. | 9.0 | – | 17.0 | – | – | – | – |
| Max. | 13.0 | 0.08 | 20.0 | 2.00 | 1.00 | 0.040 | 0.030 | |
| 347H | Min. | 9.0 | 0.04 | 17.0 | – | – | – | – |
| Max. | 13.0 | 0.10 | 19.0 | 2.00 | 1.00 | 0.045 | 0.030 |
| Grade | Tensile Strength min (MPa) | Yield Strength 0.2% Proof min (MPa) | Hardness | Elongation (% in 50mm) min | |
|---|---|---|---|---|---|
| Brinell max (HB) | Rockwell B max (HR B) | ||||
| 347/347h | 515 | 205 | 201 | 92 | 40% |
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 347 and 347H Instrumentation Tubing from David Pipes and Tubes ensures high quality and durability, as these pipes offer excellent corrosion resistance and strength. Our commitment to exceptional service and reliable delivery guarantees customer satisfaction across various industrial applications. Our expertise in stainless steel products ensures you receive a top-tier solution tailored to your needs.
David Pipes and Tubes, one of the largest suppliers of Stainless Steel 316 and 316L Instrumentation Tubing in Canberra, Australia, 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 | Japanese JIS | Swedish SS | GOST | ||
|---|---|---|---|---|---|---|---|---|
| BS | En | No | Name | |||||
| 347 | S34700 | 347S31 | – | 1.4550 | X6CrNiNb18-10 | SUS 347 | 2338 | 08Ch18N12B |
| 347h | S34709 | – | – | 1.4961 | – | SUS 347h | – | – |
Yes, we offer custom sizes for Stainless Steel 347 and 347H Instrumentation Tubing to meet your specific requirements. Our team at David Pipes and Tubes is committed to providing tailored solutions for all your Piping & tubing needs. For more details, contact us at sales@davidpipes.com.
Stainless steel 347/347H instrumentation tubing is commonly utilized in instrumentation lines, chemical injection systems, analytical equipment, and process control applications where precision, reliability, and resistance to aggressive media are essential. Its seamless or welded design guarantees leak-proof performance, smooth fluid flow, and straightforward installation. The niobium stabilization offers long-lasting protection against intergranular corrosion, making these tubes an excellent choice for petrochemical plants, refineries, power stations, and other industrial operations that require high-temperature strength, durability, and precise fluid handling.
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