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- Muscat, OMAN
Home > Stainless Steel > Stainless Steel 321 and 321H Seamless Pipes
Laila Pipes and Tubes is a reliable manufacturer and supplier of Stainless Steel 321 and 321H Seamless Pipes based in Muscat, Oman. They provide top-notch piping solutions designed to withstand high temperatures and corrosive environments. With a reputation for precision manufacturing, rigorous quality control, and a commitment to customer satisfaction, the company offers seamless SS 321 and 321H pipes that excel in thermal stability, oxidation resistance, and longevity. They cater to various industries, including petrochemical, power generation, chemical processing, and aerospace, ensuring that their products meet exact specifications, maintain uniform structure, and are delivered on time for critical applications.
Stainless Steel 321 and 321H Seamless Pipes are a type of titanium-stabilized austenitic stainless steel, made up of chromium, nickel, iron, titanium, and a controlled amount of carbon. The addition of titanium helps prevent carbide precipitation and enhances resistance to intergranular corrosion, especially during welding and when exposed to high temperatures for extended periods. SS 321H, with its higher carbon content, offers improved creep strength and performance at elevated temperatures. The seamless design not only provides excellent pressure resistance but also ensures structural integrity. These materials boast good tensile strength, remarkable ductility, and stable mechanical properties even under thermal stress.
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.
Choosing Stainless Steel 321 and 321H Seamless Pipes from Laila Pipes and Tubes guarantees exceptional corrosion resistance and high temperature performance. Their pipes are manufactured to exacting standards, ensuring reliability and durability for complex applications. With a focus on customer service, Laila offers customized solutions and technical support. In addition, the rugged design reduces leakage, making it reliable for a variety of applications.
Laila Pipes and Tubes, one of the largest suppliers of Stainless Steel 321 and 321H Seamless Pipes in Muscat, OMAN, 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 |
Yes, we offer custom sizes for Stainless Steel 321 and 321H Seamless Pipes to meet your specific requirements. Our team at Laila Pipes and Tubes is committed to providing tailored solutions for all your Piping & tubing needs. For more details, contact us at sales@lailapipes.com.
These Stainless Steel 321 and 321H Seamless Pipes are commonly used in situations that demand resistance to high temperatures and intergranular corrosion. You’ll find them in heat exchangers, superheaters, refinery heaters, exhaust systems, chemical processing equipment, and aircraft components. They are also essential in power plants, oil and gas facilities, and industrial heating systems where thermal cycling, weld reliability, and long-term performance are crucial. With their dependable performance in continuous high-temperature settings, SS 321 and 321H seamless pipes are the go-to choice for challenging industrial applications.
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