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- Kolkata, Kolkata
Home > Stainless Steel > Stainless Steel 321 and 321H Instrumentation Tubing
In Delhi, India, Ojas Pipes and Tubes is a reputable and top producer and supplier of stainless steel 321 and 321H instrumentation tubing. We provide expertly designed tubing solutions that function exceptionally well in corrosive and hot conditions. Titanium stabilises SS 321/321H tubing, providing exceptional resistance to intergranular corrosion and preserving strength under heat stress. Ojas guarantees that all tubing meets international quality standards and is appropriate for instrumentation systems in demanding industrial environments. Our tubing is perfect for applications needing consistency and safety in measurement and control systems because of its reputation for longevity, dimensional accuracy, and clean internal surfaces.
Chromium (17–19%), nickel (9–12%), and titanium (at least five times the carbon content) are present in stainless steel 321 and 321H instrumentation tubing. For enhanced high-temperature strength, 321H has a higher carbon content (0.04–0.10%). In trace amounts, other elements include silicon, phosphorus, sulphur, and manganese. With a minimum tensile strength of 75,000 psi (515 MPa) and a yield strength of 30,000 psi (205 MPa), these grades offer exceptional mechanical qualities. By preventing carbide precipitation, the titanium stabilisation improves structural integrity and corrosion resistance over extended heat exposure and thermal cycling.
| 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 Ojas 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.
Ojas Pipes and Tubes, one of the largest suppliers of Stainless Steel 321 and 321H Instrumentation Tubing in Kolkata, India, 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 Ojas Pipes and Tubes is committed to providing tailored solutions for all your Piping & tubing needs. For more details, contact us at sales@ojaspipesandtubes.co.in.
High-temperature instrumentation systems that require exceptional mechanical strength and corrosion resistance frequently use stainless steel 321 and 321H instrumentation tubing. Chemical processing facilities, refineries, thermal oxidisers, power generation systems, and aerospace control lines are examples of typical applications. These tubes can also be used as instrumentation in heat exchangers, exhaust systems, and steam lines. Because of its higher carbon content, 321H is recommended for even more demanding high-temperature operations, while SS 321 is perfect for continuous service temperatures up to 900°C. In harsh and variable conditions, the tubing guarantees precise signal transmission, pressure control, and accurate measurement.
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