- sales@davidpipes.com
- Canberra, Australia
Home > Stainless Steel > Stainless Steel 321 and 321H Instrumentation Tubing
David Pipes and Tubes is a reputable manufacturer and supplier of stainless steel 321/321H instrumentation tubing, proudly based in Canberra, Australia. They specialize in providing top-notch tubing solutions that are perfect for precision applications, especially those that demand outstanding corrosion resistance, high-temperature strength, and precise dimensions. The stainless steel 321/321H instrumentation tubing is stabilized with titanium to prevent carbide precipitation, which guarantees durability and reliability even in tough, high-temperature environments. With meticulous manufacturing processes and a strong commitment to international standards, David Pipes and Tubes offers both seamless and welded 321/321H instrumentation tubing, catering to industries like chemical processing, petrochemical, power generation, and instrumentation systems.
This tubing is made up of chromium (17–19%), nickel (9–13%), and titanium (0.3–0.8%), with the 321H variant featuring a higher carbon content to boost its high-temperature strength. This unique composition provides remarkable resistance to intergranular corrosion, oxidation, and thermal fatigue. The tubing boasts a tensile strength ranging from 515 to 700 MPa, a yield strength of 205 to 275 MPa, an elongation of 35 to 40%, and a hardness of less than 90 HRB. These impressive mechanical and chemical properties ensure that the tubing is durable, structurally sound, and performs reliably in critical instrumentation applications.
| Grade | Range | Ni | Cr | P | Fe | C | Mn | N | Si | S | Ti |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 321 | Min. | 9.0 | 17.0 | 0 | 65.045 | – | – | – | – | – | – |
| Max. | 12.0 | 19.0 | 0.045 | – | 0.08 | 2.0 | 0.10 | 1.0 | 0.030 | 5(C+N) -0.70 | |
| 321H | Min. | 9.0 | 17.0 | – | 65.25 | 0.04 | – | – | – | – | – |
| Max. | 12.0 | 19.0 | 0.045 | 0.010 | 2.00 | 0.10 | 1.00 | 0.030 | 4(C+N) -0.70 |
| 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) | ||||
| 321/321h | 515 | 205 | 217 | 95 | 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 321 and 321H 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 321 and 321H 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 | |||||
| 321 | S32100 | 321S31 | X6CrNiTi18-10 | 1.4541 | – | SUS 321 | 2337 | – |
| 321h | S32109 | 321S51 | X10CrNiTi18-10 | 1.4878 | – | SUS 321h | – | – |
Yes, we offer custom sizes for Stainless Steel 321 and 321H 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 321/321H instrumentation tubing is commonly utilized in process control lines, chemical injection systems, analytical instruments, and various high-temperature or corrosive environments that require precise fluid handling. Its seamless or welded design guarantees leak-proof performance, accurate flow control, and straightforward installation. The titanium stabilization effectively prevents intergranular corrosion during welding or heat exposure, making these tubes perfect for petrochemical plants, refineries, power stations, and other industrial settings where reliability, longevity, and high-temperature performance are crucial.
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