- sales@tunpipes.com
- Naypyidaw, Myanmar
Home > Stainless Steel > Stainless Steel 321/321H Seamless Tubing
Tun Pipes, located in Naypyidaw, Myanmar, stands out as a top manufacturer and supplier of premium stainless steel products, with a focus on seamless tubing. They pride themselves on their dedication to precision, durability, and ensuring customer satisfaction. Tun Pipes caters to a variety of industries that need dependable and corrosion-resistant piping solutions. One of their standout products is the Stainless Steel 321/321H seamless tubing, which is renowned for its outstanding performance in high-temperature and challenging environments. By utilizing cutting-edge manufacturing techniques and rigorous quality control, Tun Pipes guarantees that every tube meets international standards, making it a go-to choice for industrial, chemical, and engineering applications throughout Myanmar and Southeast Asia.
The Stainless Steel 321/321H seamless tubing is an austenitic chromium-nickel alloy that’s stabilized with titanium, which boosts its resistance to intergranular corrosion. It typically contains 17–19% chromium, 9–12% nickel, and titanium to enhance stability at high temperatures. This tubing boasts impressive mechanical properties, with tensile strength ranging from 515–750 MPa and yield strength between 205–275 MPa, depending on the grade and heat treatment. Its elongation is usually 40% or more, providing flexibility without sacrificing strength. The 321H variant, with its higher carbon content, offers enhanced creep resistance, making both grades perfect for extreme temperature and pressure situations.
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.
Choosing Stainless Steel 321/321H Seamless Tubing from Tun Pipes and Tubes guarantees you a high-performance product designed for challenging environments. Our tubing offers exceptional resistance to oxidation and intergranular corrosion, making it perfect for high-temperature applications in industries like aerospace, chemical processing, and petrochemical. With a focus on quality, we implement stringent testing and quality control measures to ensure durability and reliability. Our expert team provides tailored solutions to meet your specific needs, ensuring customer satisfaction. Trust Tun for superior stainless steel tubing that enhances the safety and efficiency of your operations.
Tun Pipes and Tubes, one of the largest suppliers of Stainless Steel 321/321H Seamless Tubing in Naypyidaw, Myanmar, 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.
Yes, we offer custom sizes for Stainless Steel 321/321H Seamless Tubing to meet your specific requirements. Our team at Tun Pipes and Tubes is committed to providing tailored solutions for all your Piping & tubing needs. For more details, contact us at sales@tunpipes.com.
| 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 commonly found in settings that demand high corrosion resistance and thermal stability. You’ll often see it in chemical processing, petrochemical plants, and power generation systems, where the tubes are exposed to high-temperature fluids and gases. Its exceptional strength and oxidation resistance make it ideal for exhaust systems, heat exchangers, and furnace components. Plus, it’s also used in the aerospace, food processing, and pharmaceutical industries, where hygiene and durability are key.
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