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321 Stainless Steel Tubing – Properties and Applications

The properties and applications of 321 grade stainless steel tubing are endless. There are two different gauges of 321 tubing – the thicker and the thinner one. They are also available in different thicknesses and sizes.

Stainless steel of Type 321 is susceptible to stress corrosion cracking in halides. Its nickel content makes it comparable to Type 304. The conditions for stress corrosion cracking are the presence of halide ion, residual tensile stress, and an environment over 120 deg F. Stress relief annealing does not significantly reduce the corrosion resistance of Type 321 stainless steel. However, prolonged heating tends to reduce general corrosion resistance. 321 stainless steel tube has a lot of usages.


The properties of 321 stainless steel tubes make them popular in various industries. Because of their high corrosion resistance, these tubes are particularly suitable for use in chemical processing equipment. In addition to being extremely durable, they also exhibit excellent stability at high temperatures.


Type 321 stainless steel has the properties of both austenitic and ferritic metals. The former has an enhanced elasticity and is suited for marine environments. The latter is prone to crevice corrosion and pitting and is unsuitable for marine environments. Moreover, Type 321 stainless steel is less susceptible to sensitization when serviced at high temperatures. Let us discuss some of the properties of this stainless steel and why it’s used for marine applications.

The main properties of Type 321 stainless steel are excellent forming and welding characteristics and a high degree of toughness in cryogenic environments. While Type 304L stainless steel is more commonly used and supplied, the former performs well in high temperatures. However, Type 321 stainless steel is unsuitable for various architectural features, and polishing is not feasible. This means it’s not suited for use in buildings with a high degree of aesthetics.


Grade 321 Stainless Steel is a standard austenitic 18/8 stainless steel that is stabilized with Titanium and has good intergranular corrosion resistance. This stainless steel can be welded at temperatures between 425 and 900 degrees Celsius. Its strength, toughness, and forming characteristics make it an excellent choice for various applications. Although 321 is not a consumable for welding, it can be used in conventional applications where toughness and flexibility are essential.

Type 321 Stainless Steel Tubes are readily shaped and have exceptional forming properties. Because of its excellent welding properties, this material is the preferred choice for industrial applications. 321 Stainless Steel Tubes existed in various sizes and shapes. Steber Steel is one of the leading global manufacturers and exporters of 321 Stainless Steel Seamless Pipes and Tubes.


The price of 321 stainless steel tubes can vary widely. 321 stainless steel tubes are priced around the $10/ft mark. They can be either seamless or have a wall thickness of 16 gauge. These stainless-steel tubes are available in various sizes, ranging from 1 foot to 5 feet. They are also sold on foot. These products are generally made in the U.S.A. and are often sold in bundles or loose.

Prices for 321 SS tubing can vary, as they are manufactured using different manufacturing processes. This material is ideal for applications that require irregular warming between 800°F (427°C) and 1650°F (899°C). Because 321 SS tubing is so strong, it is often welded with a helical structure to ensure that it is strong and corrosion-resistant. However, a helical structure or a tight bend requires a more expensive product than one with a similar diameter. Stainless steel is a blessing to the construction industry.


If you are looking for a flexible, corrosion-resistant tubing material, you should consider the types and sizes of 321 stainless steel tubes. These steel tubes are available in various sizes and wall thicknesses. Depending on your requirements, they are commonly available in lengths ranging from a few feet to 5 feet. You can also find these tubes in coil form and straight lengths.


There are several different finishes for 321 stainless steel tubes. These finishes may vary according to the type of product being produced. Type 321 is austenitic stainless steel. It is not susceptible to heat treatment but can be annealed to increase its hardness after severe forming. Unlike type 304, 321 cannot be hardened using heat treatment. Only cold working can harden it. Depending on the application, Type 321 stainless steel tubes may require annealing.

Final Take

Some manufacturers choose to finish 321 stainless steel tubes with different finishes, depending on the intended purpose. For instance, a polished pipe is this product’s most desirable type of finish. This type of finish may be abrasive or glossy. AMS ASTM and two-dimensional finishes are available for 321 stainless steel tubes. These finishes are available in many forms, so it is best to consult a professional about the finish you need for your application.

Eleena Wills
Hi, I’m Eleena Wills. Being a writer and blogger, I strive to provide informative and valuable articles to people. With quality, constructive, and well-researched articles, one can make informed choices. I cover a wide range of topics, from home improvement to hair styling and automotive.


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