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Home > Stainless Steel > Stainless Steel 321/321H Seamless Tubing
Iris Pipes and Tubes, based in Cairo, Egypt, has made a name for itself as a top-notch manufacturer and supplier of **Stainless Steel 321/321H Seamless Tubing**. They specialize in providing high-quality tubing solutions designed for high-temperature and corrosive environments. The company prides itself on precision engineering, quality assurance, and ensuring customer satisfaction, consistently delivering products that adhere to global standards. These seamless tubes are celebrated for their durability, strength, and remarkable resistance to oxidation, making them a go-to choice for critical industrial applications. With a solid logistics system and a robust technical foundation, Iris Pipes and Tubes caters to various industries, including petrochemical, oil and gas, power generation, heat exchangers, and food processing, both in Egypt and beyond.
Stainless Steel 321/321H Seamless Tubing consists of iron, 17-19% chromium, 9-12% nickel, and up to 1% titanium, which enhances its resistance to high-temperature oxidation. The mechanical properties include a tensile strength of approximately 515 MPa and a yield strength of around 205 MPa, ensuring excellent durability. The advantages of 321/321H tubing include superior resistance to intergranular corrosion, making it suitable for elevated temperatures. Its titanium addition prevents carbide precipitation, ensuring stability in high-temperature applications. This tubing is ideal for use in chemical processing, aerospace, and petrochemical industries.
Tube Range : 6.35 mm OD To 101.6 mm OD Guage: 25 SWG – 10 SWG
Outer Diameter : 3.00 mm – 219.10 mm
Wall Thickness : 0.40 mm – 12.70 mm
Schedules : 5, 10S, 10, 30, 40S, 40, 80, 80S, XS, 160, XXH
Length : Upto 30 meters, Custom Cut Lengths
Specifications : ASTM A213 / ASTM SA213
Types : Round, Square, Rectangle, Coil, “U” Shape, Hydraulic & Honed Tubes
| SS | 321 | 321H |
| Ni | 09 – 12 | 09 – 12 |
| N | 0.10 | 0.10 |
| Cr | 17 – 19 | 17 – 19 |
| C | 0.08 max | 0.04 – 0.08 |
| Si | 1 max | 0.75 max |
| Mn | 2 max | 2 max |
| P | 0.040 max | 0.045 max |
| S | 0.030 max | 0.03 max |
| TI | 4(C+N) | 0.70 max |
| Grade | 321 | 321H |
| Tensile Strength (MPa) min | 515 | 515 |
| Yield Strength 0.2% Proof (MPa) min | 205 | 205 |
| Elongation (% in 50mm) min | 40 | 40 |
| Hardness | ||
| Rockwell B (HR B) max | 95 | 95 |
| Brinell (HB) max | 217 | 217 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
**Stainless Steel 321/321H Seamless Tubing** is made from titanium-stabilized austenitic stainless steels, containing around 17–19% chromium, 9–12% nickel, and a bit of titanium to help prevent intergranular corrosion. The 321H variant has a higher carbon content, which enhances its creep strength and performance at high temperatures. Both grades boast impressive mechanical properties, including high tensile strength, good yield strength, and excellent oxidation resistance up to 900°C. Their well-balanced chemical composition ensures they are easy to form, weld, and maintain stability under heat and stress.
Iris Pipes and Tubes, one of the largest suppliers of Stainless Steel 321/321H Seamless Tubing in Alexandria, Egypt, 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.
These **Stainless Steel 321/321H Seamless Tubing** products are commonly found in high-temperature and corrosive applications where strength and stability are crucial. You’ll often see them in heat exchangers, boiler tubes, refinery and petrochemical equipment, exhaust manifolds, and even aircraft engine components. They’re perfect for industries like chemical processing, power generation, oil refining, and pharmaceuticals. Their ability to resist oxidation and scaling also makes them a great fit for furnace parts and thermal processing equipment. Plus, these tubes are used in food and beverage systems due to their cleanliness, corrosion resistance, and ability to maintain structural integrity.
| Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
| BS | En | No | Name | ||||
| 321 | S32100 | 321S31 | 58B, 58C | 1.4541 | X6CrNiTi18-10 | 2337 | SUS 321 |
| 321H | S32109 | 321S51 | – | 1.4878 | X6CrNiTi18-10 | – | SUS 321H |
Stainless Steel 321/321H Seamless Tubing is widely used in high-temperature applications due to its excellent oxidation resistance and mechanical stability. It is commonly employed in the aerospace industry for exhaust systems, fuel lines, and other components exposed to extreme conditions. In the chemical processing sector, this tubing is ideal for handling corrosive substances and in heat exchangers. Additionally, it is used in petrochemical applications, pressure vessels, and power generation equipment. Its durability and reliability make it a preferred choice for critical applications across various industries.
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