Midland, UK-based Weston Stainless offers reliable supplies of stainless steel products that are hard-wearing and efficient for most industries. Westons Stainless Steel 321 Tubing is titanium-stabilized austenitic stainless steel with great resistance against intergranular corrosion and oxidation at high temperatures. Seamless, welded, round, and square shapes are provided. The tubing is highly mechanistic and strong. SS 321 tubing has high weldability, resistance to oxidation, and durability in extreme thermal conditions, and thus it is a good choice for applications that require strength and longevity under high-stress conditions.
Stainless Steel 321 Tubing is made up of 17-19% chromium, 9-12% nickel, and titanium (five times the content of carbon) for enhanced thermal stability. These tubes have a tensile strength of 515 MPa, a yield strength of 205 MPa, and an elongation of 40%. They are around 95 HRB hard. SS 321 is 7.9 g/cm³ in density, has a melting point of 1400°C, and is 16.3 W/m-K in thermal conductivity, offering superior heat resistance and structural properties in high-temperature use.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Other | |
|---|---|---|---|---|---|---|---|---|---|---|---|
|
321 |
min.
max |
–
0.08 |
2.00 |
0.75 |
0.045 |
0.030 |
17.0
19.0 |
– |
9.0
12.0 |
0.10 |
Ti=5(C+N)
0.70 |
|
Grade |
Tensile Strength (MPa) min |
Yield Strength 0.2% Proof (MPa) min |
Elongation (% in 50mm) min |
Hardness |
|
|---|---|---|---|---|---|
|
Rockwell B (HR B) max |
Brinell (HB) max |
||||
|
321 |
515 |
205 |
40 |
95 |
217 |
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321 Stainless Steel Tubing is commonly used in marine, petrochemical, aerospace, and power generation industries. Its excellent oxidation resistance makes it suitable for exhaust systems, furnace components, heat exchangers, and high-temperature chemical process. The tubing also finds application in pressure vessels, refinery equipment, and tubes in boilers where exposure to hostile chemicals and high temperatures is prevalent. Its fine weldability, strength, and thermal fatigue resistance make it a material of choice for severe industrial conditions demanding long-term dependability.
Resists oxidation and corrosion at high temperatures, offering excellent stability and durability. It’s ideal for aerospace, chemical, and high-temperature applications due to its strength and resistance.
Provides excellent resistance to high temperatures and corrosion, ideal for aerospace and chemical applications. It offers good weldability and stability, ensuring durability in demanding environments.
Superior resistance to high temperatures and corrosion, making them ideal for heat exchange applications in aggressive environments. They ensure durability and efficient thermal performance.
Excellent resistance to high temperatures and corrosion, ensuring reliable performance in precise measurement and control systems. Its stability and strength make it ideal for critical applications.
High resistance to oxidation and corrosion at elevated temperatures, making them ideal for boiler systems. Their durability and strength ensure efficient heat transfer and long service life.
Excellent high-temperature resistance and corrosion protection, making them ideal for heat exchangers and condensers. Their durability and flexibility ensure reliable performance in challenging environments.
Weston Stainless provides test certificates, including Mill Test Certificates (MTC) as per EN 10204 3.1, ensuring compliance with global quality standards. The tubing is securely packed in wooden crates, plastic wrapping, or carton boxes to prevent damage during transit. With an efficient supply chain, Weston Stainless ensures timely and reliable worldwide delivery, meeting urgent industrial demands with precision and care.
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