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Home > Stainless Steel > Stainless Steel 321 and 321H Seamless Pipes
Iris Pipes and Tubes, located in Cairo, Egypt, has built a solid reputation as a reliable manufacturer and supplier of top-notch **Stainless Steel 321 and 321H Seamless Pipes**. With a strong focus on precision engineering and adherence to international quality standards, the company meets a wide range of industrial needs both in Egypt and around the globe. These pipes are celebrated for their outstanding resistance to oxidation and corrosion, even when exposed to high temperatures. Iris Pipes and Tubes is dedicated to delivering superior product performance, ensuring timely deliveries, and achieving customer satisfaction, making them a go-to choice in sectors like petrochemical, power generation, construction, and food processing.
Stainless Steel 321 and 321H Seamless Pipes are mainly steel, with chromium content of 17-19% and nickel content of 9-12%, with titanium for stabilization these pipes exhibit good mechanical properties, with high tensile strength (up to 750 MPa including ), good ductility, high temperature oxidation, scaling and resistance are Type 321H for improved creep resistance. Benefits include exceptional corrosion resistance, heat resistance, and suitability for use in the chemical, aerospace, and oil and gas industries, providing durability and durability in difficult areas.
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 321 | S32100 | 1.4541 |
| SS 321H | S32109 | 1.4878 |
| 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 and 321H Seamless Pipes** are a type of titanium-stabilized austenitic stainless steel, featuring around 17–19% chromium, 9–12% nickel, and a bit of titanium to boost resistance against intergranular corrosion. The 321H grade has a higher carbon content, which enhances its creep strength at elevated temperatures. Both grades boast impressive mechanical properties, such as high tensile strength, good yield strength, and remarkable toughness. They maintain their structural integrity and oxidation resistance up to approximately 900°C. Their chemical makeup guarantees durability, weldability, and reliable performance in challenging thermal and corrosive settings.
Iris Pipes and Tubes, one of the largest suppliers of Stainless Steel 321 and 321H Seamless Pipes 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.
| 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 |
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (m/m/0C) | Thermal Conductivity (W/m.K) | Specific Heat 0-1000C (J/kg.K) | Electrical Resistivity (n.m) | |||
| 0-100°C | 0-315°C | 0-538°C | at 100°C | at 500°C | |||||
| 321 | 8027 | 193 | 16.6 | 17.2 | 18.6 | 16.1 | 22.2 | 500 | 720 |
You’ll find **Stainless Steel 321 and 321H Seamless Pipes** commonly used in high-temperature and corrosive environments where strength and stability are crucial. Typical applications include heat exchangers, boiler tubes, exhaust systems, refinery equipment, and aircraft manifolds. They’re particularly well-suited for industries like chemical processing, oil and gas, power generation, and pharmaceuticals. Plus, their excellent resistance to oxidation and scaling makes them perfect for furnace components and thermal processing facilities. Both grades are also favored in the food and beverage sector for their hygienic and corrosion-resistant piping systems.
Stainless Steel 321 and 321H Seamless Pipes are widely used in various industries due to their excellent resistance to heat and corrosion. Typical applications include the aerospace industry, where it is used in aircraft exhaust systems and fuel lines. In the chemical industry, these pipes are ideal for dealing with corrosives. It is used in oil and gas pipelines, power plants and automotive exhaust systems. Their ability to withstand high temperatures makes them suitable for applications requiring high strength and power, and allows them to work for long periods in harsh environments.
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