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321 Stainless Steel Tubing is a low carbon and austenitic stainless steel that contains 17-19% Chromium, 9-12% Nickel, 0.08% Max Carbon, 2.00% Max Manganese, 0.045% Max Phosphorus, 0.030% Max Sulfur and 1.00% Max Silicon. This composition gives the material increased strength and resistance to corrosion compared to other stainless steels.

SS 321 Tubing is highly resistant to corrosion and has excellent strength, making it suitable for various applications. It is often used in manufacturing exhaust tubing, heat exchanger tubing, and large industrial piping. It can also be used in food processing equipment, marine components, and chemical tanks. This type of steel is easy to weld, form, and machine due to its good ductility and stability over time.

Chemical Composition of Stainless Steel 321 Tubing

Explore the chemical composition of Stainless Steel 321 Tubing, crucial for understanding its properties.


0.70 max


Stainless Steel 321 Tubing's composition ensures corrosion resistance and structural integrity in various applications.

Mechanical Properties of 321 Stainless Steel Tubing

Discover the range of applications by examining the comprehensive breakdown of its mechanical properties in the provided table.

GradeTensile Strength (MPa) minYield Strength 0.2% Proof (MPa) minElongation (% in 50mm) minHardness
Rockwell B (HR B) maxBrinell (HB) max



321 Stainless Steel Tubing exhibits high tensile strength and elongation, ensuring durability in various applications.

Physical Properties of Stainless Steel 321 Tubing

Stainless Steel 321 Tubing offers robustness and thermal stability for various industrial applications.




Elastic Modulus


Mean Co-eff of Thermal Expansion (µm/m/°C)

Thermal Conductivity


Specific Heat 0-100°C


Elec Resistivity


0-100°C0-315°C0-538°CAt 100°CAt 500°C

Stainless Steel 321 Tubing boasts favorable physical properties, ideal for demanding engineering environments.

Advantages of Using 321 Stainless Steel Tubing

Are there any advantages to choosing 321 stainless steel tubing over other types of metal or even traditional stainless steel tubing? There certainly are! Some of the benefits offered by this type of stainless steel tubing include the following:

  • High-Temperature Resistance - While most types of stainless steel are temperature resistant to some degree, 321 stainless steel tubing offers a much greater performance under high temperatures than alternatives like 304 stainless steel tubing.
  • Cost-Effectiveness - When looking at the improved temperature resistance for this metal, as well as its resistance to corrosion, it’s a much more affordable option than some other stainless steel alloys that might not hold up so well under high temperatures.
  • Chemical Stability - Many types of metals have very limited stability when exposed to chemicals. In the case of 321 stainless steel tubing, it’s stable when exposed to a variety of chemicals, including organic and inorganic acids.
  • Formability and Machinability - In terms of how easy it is to work with, 321 stainless steel tubing has an advantage over some of the other stainless steel counterparts. It’s incredibly malleable, which lends well to formability and even to machining.
  • Creep Resistance - 321 stainless steel tubing shows good creep strength, which means that it’s able to resist deformation (even under significant strain) for extended time periods.

As you can see, there are many advantages to using 321 stainless steel tubing in your project or application. Stainless steel is always valuable, but this type is outstanding.

This unique alloy of metals has all the strength and durability of other stainless steels but combines it with a temperature resistance and cost-effectiveness that sets it apart.

FAQ's for Stainless Steel 321 Tubing

The Price Range For Stainless Steel 321 Tubing Products Is ₹250 To ₹300 Per Kilogram.

The HSN code for Stainless Steel 321 Tubing is 7304.4190.

Yes, Stainless Steel 321 Tubing is heat resistant and can withstand high temperatures of up to 870°C (1600°F). This makes it suitable for use in applications where exposure to high temperatures is expected, such as in the chemical and aerospace industries.

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