321 stainless steel tube is a titanium-stabilised austenitic seamless tube. According to ASTM A213, these tubes have a tensile strength ranging approximately from 515 MPa. The material has high-temperature uses up to 870°C in heat and structural roles. It is one of the grades of austenitic stainless steel tubes.
ASTM A213 Stainless Steel 321 Seamless Tube Manufacturer
We, at XTD (Zhejiang Xintongda Special), are a leading manufacturer in China and a supplier of stainless steel 321 seamless tubes worldwide. Our stainless steel 321 tube is titanium-stabilised. It primarily consists of chromium (17.0-19.0%), nickel (9.0-12.0%), iron (balance), and traces of titanium. As a Multiple International Certified company, all products are manufactured strictly in accordance with ASTM A213, A269, A511, and EN10206-5 standards. The stabilised titanium prevents carbide precipitation during welding. Our 321 ss tubes provide benefits, such as strong corrosion resistance, exceptional oxidation resistance and accurate dimensional precision. These tubes are ideal for high-temperature applications, and harsh environmental conditions. Our tubes are designed for applications, such as heat exchangers, furnace parts, aircraft exhaust manifolds, bellows, heating element tubing and expansion joints. As a global supplier, we maintain an annual stock of 25,000 tons, an MOQ of 200 kg, or no minimum for stock, and lead times of one week for stock or 15-60 days for production orders.
Product Specification:
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Standard
ASTM A213
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OD Range
6.35-257 mm
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Thickness
0.89-12.7 mm
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Length
≤ 22 m
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Technical Data
Technical Data
321 Seamless Stainless Steel Tube Manufacturing Process
We begin SS 321 tube production by selecting high-quality billets. These billets are hot-extruded or pierced to form seamless tubes, followed by cold drawing to achieve precise dimensions. Heat treatment is then carried out at high temperatures to stabilise the structure. All tubes are examined to ensure that they meet the surface quality, and dimensional requirements. This technique ensures the consistent performance of stainless steel 321 tubes in high-temperature applications. To learn more about the manufacturing process, visit this page.
Characteristics of 321 Stainless Steel Tube
Our 321 stainless steel tubes have 4 key characteristics, which include high-temperature performance, excellent corrosion resistance, strong oxidation resistance and titanium stabilisation.
- High Temperature Performance: Our 321 stainless steel tubes can withstand temperatures up to 870°C without losing strength. This stability prevents warping or failure over extended thermal stress, ensuring safe, and effective performance in high-temperature industries.
- Corrosion Resistance: SS 321 tubes offer resistance to pitting and crevice corrosion caused by aggressive chemicals and chlorides. In harsh environments, high corrosion resistance reduces maintenance costs and prolongs service life.
- Good Oxidation Resistance: Our 321 stainless steel tubes create a protective oxide coating to prevent scale formation. These tubes are particularly essential for burner tubes and heating elements. This oxidation resistance keeps the tube intact over multiple heating cycles. This increases endurance under oxidative conditions.
- Titanium Stabilised: In 321 stainless steel, titanium and carbon form a bond. This bond prevents weld decay, a type of intergranular corrosion that can occur after heating. Titanium stabilisation preserves mechanical strength at high temperatures, while preventing intergranular corrosion during welding. The stabilisation process makes finished constructions strong and leak-proof.
ASTM A213 TP321 Stainless Steel Tube Equivalent Material
Our ASTM A213 TP321 stainless steel tubes comply with global standards for seamless stainless steel 321 tubes. The standard equivalent designation of this alloy is UNS S32100, and it is also recognised by its Werkstoff number as DIN 1.4541. We ensure these tubes adhere to the material grades listed below.
| GRADE | UNS | GB | JIS | ISO | DIN/EN | GOST | |
| ISC | NEW | ||||||
| 321 | S32100 | S32168 | 06Cr18Ni10Ti | SUS321 | X6CrNiTi18-10 | 1.4541 | 08X18H10T |
100% Certified Testing & Documentation
- EN 10204 3.1 and EN 10204 3.2 Material Test Certificates (MTC)
- Raw Materials Certificate
- 100% PMI
- Heat Treatment Charts
- Third-Party Inspection Report
- Surface roughness and size measurement
- Manufacturer Test Certificate (Impact Testing, Flattening, Flare, Bend, Hardness, Intergranular, Pitting Corrosion, Grain size, ET, UT, HT)
- Laboratory Test Certificate from the Government-Approved Lab
What are Common Industrial Applications for Stainless Steel 321 Tubes?
Stainless 321 seamless tubes are widely used in high-temperature environments due to their exceptional corrosion resistance, and stability. There are 8 primary applications for these tubes. To provide clarity, each application is outlined below.
Heat Exchanger Tubes
Stainless 321 seamless tubes are ideal for heat exchangers. These tubes can withstand high temperatures and corrosive fluids. ASME SA213 TP321 stainless steel tubes meet the requirements for boiler and pressure vessel applications. This ensures reliable heat transfer in power plants and chemical processing.
Woven or Welded Screens for High-Temperature Mineral Processing
Our tubes are used to create long-lasting woven or welded screens that can endure high temperatures during mineral processing. Due to its oxidation resistance, stainless 321 seamless tubes are ideal for sifting hot materials without degradation.
Furnace Parts
We provide SS 321 seamless tubes for furnace components, as these tubes are durable. These parts can withstand continuous exposure to high temperatures and scaling. Stainless 321 seamless tubes ensure structural integrity and reduce downtime in industrial furnaces.
Spiral-Welded Tube for Burner Tubes and Flue
These tubes are used to strengthen the burner tubes and flue systems in combustion systems. As stainless 321 seamless tubes can withstand thermal wear, they are the ideal option for efficient gas flow in heating applications.
Aircraft Exhaust Manifolds
Our ASME SA213 tubes are used in aircraft exhaust manifolds to handle high exhaust temperatures and vibrations. These tubes provide the lightweight durability required for aircraft safety and performance.
Bellows
ASME SA213 TP321 stainless steel tube is bent into flexible bellows that adjust for temperature expansion in pipe systems. The seamless construction provides leak-free performance under pressure.
Heating Element Tubing
Our SS321 tubes protect heating elements, providing insulation and preventing oxidation. They provide reliable performance in electric heaters and industrial ovens.
Expansion Joints
ASME SA213 TP321 stainless steel tubes are used as expansion joints in pipelines, absorbing movement caused by temperature variations. As stainless 321 seamless tubes enhance longevity in demanding infrastructure projects.
Frequently Asked Questions
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What is a 321 stainless steel tube?
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What is the difference between Stainless Steel 321 and 316 tubes?The difference between stainless steel 321 and 316 tubes is due to heat resistance, and corrosion resistance. SS 321 performs effectively at higher temperatures, while SS 316 is more resistant to chlorides and acids.