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321 Stainless Steel Tubing

Another variant of the 304 standards, 321 stainless steel tubing (UNS designation UNS S32100) composition includes titanium which makes the resulting tubing stronger and more corrosion resistant at higher temperatures.

Specifically, 321 stainless steel has substantially better resistance to intergranular corrosion which is corrosion that occurs in between the microstructure---between the grains of different elements that make up the alloy.  321 SS is, therefore, an important material option for tubing products with service cycles in the 800-1500º carbide precipitation range because the life of the product will be extended (relative to other grades of stainless steel).

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321 SS Tubing Features & Applications

321 stainless steel tubing manufactured for high-temperature applications exhibits excellent resistance to fatigue and cracking, making it ideal for applications including:

  • Metal O-ring products
  • Select aerospace applications
  • Exhaust manifolds
  • Oil and gas/refinery applications
  • Processing equipment for high-temperature chemicals
  • Many other high-temperature service applications

Like our other welded and drawn products, 321 SS tubing is welded from strip stock, plug drawn in coil form, annealed as needed in order to meet customer temper requirements, and offered in straight lengths or coil form.


Learn more about the most popular and widely used dimensions in the industry. 

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Contact American Tube Technology Inc.

Our tubing production facility is centrally located in Denver, CO.

phone icon720-582-4748


fax icon1-303-282-7641

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