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321 Stainless Steel Bar

High-temperature resistance and corrosion resistance, all in one: 321 stainless steel bar

Don't compromise on durability: choose 321 stainless steel bar for your industrial needs

321 stainless steel bar: the perfect solution for high-temperature environments

It is a typical austenitic 18/8 chromium-nickel alloy with titanium added. Moreover, because it has been subjected to high temperatures, it has developed a high level of resistance to intergranular corrosion. Intergranular corrosion is less likely to occur because of the titanium’s strengthening effect on the material. That is why 321 is chosen as the stainless steel of choice for applications that require up to 900° C.

Why Get 321 Stainless Steel Bar?

Looking for a durable and reliable option for your metal needs? Look no further than 321 stainless steel round bar. This versatile material offers numerous benefits over other metals, including:

  • Corrosion resistance: thanks to its chromium, nickel, and molybdenum content, 321 stainless steel is highly resistant to corrosion and rust.

  • Machinability: 321 stainless steel is easier to machine than many other types of stainless steel, making it a popular choice for various machining applications.

  • Versatility: 321 stainless steel round bar is widely used in industries ranging from construction to architecture, industrial, and marine applications, making it a versatile and reliable choice for a range of projects.

With its impressive durability, corrosion resistance, and ease of machining, 321 stainless steel round bar is a smart choice for anyone looking for a high-quality, long-lasting material.

Machinability & Welding

Cold working is the only method of hardening 321 stainless. Heat treatment is not an option. It is easily welded using any standard procedure, and it does not require any post-weld annealing after the welding process. It is ductile, which means it can be formed with relative ease. 

When used in chloride solutions, it has excellent corrosion resistance, especially against dilute organic acids; however, it is susceptible to pitting and crevice corrosion, making it unsuitable for these applications.


321 stainless steel round bar is a popular type of stainless steel that is popular in a wide range of applications due to its excellent combination of high strength and good corrosion resistance. Its high-temperature resistance also makes it suitable for use in applications where extreme heat is present.

One of the primary applications of  this steel is in the aerospace industry, where it is helpful for components such as exhaust systems, jet engine parts, and hydraulic lines. Its ability to withstand high temperatures and its resistance to oxidation and corrosion makes it an ideal material for these applications.

In addition to the aerospace industry, it  is also useful in the petrochemical industry for components such as heat exchangers, pressure vessels, and storage tanks. Its corrosion resistance makes it well suited for these applications, where it will be exposed to harsh chemicals and corrosive environments.

Other industries that use 321 stainless steel round bar include the automotive industry for exhaust systems and mufflers, the food processing industry for equipment that needs to withstand high temperatures and corrosive environments, and the medical industry for surgical instruments and implants.


Tensile strength


Hardness, Brinell 

Proof Stress 

515 MPa

A5 40%


0.2% 205 MPa

Chemical Properties








17.00 – 19.00


9.00 – 12.00





O’Hare’s 321 Stainless Steel

O’Hare Precision Metals has a reputation for providing top-quality stainless steel products to various industries. Our stainless steel bar is a versatile and reliable material that is perfect for many applications. With our extensive inventory of steel bar stocks, we can provide you with the material you need, when you need it. Our team of experts can help you choose the right size, shape, and finish of stainless steel bars to meet your specific requirements.

We take pride in offering exceptional customer service, fast turnaround times, and competitive pricing. Our goal is to provide our customers with the best possible experience, from the moment they contact us to the delivery of their products. Whether you need a small quantity of steel bars or a large volume order, we are ready to help.

At O’Hare Precision Metals, we understand the importance of high-quality materials for your projects. That’s why we ensure that all of our bar stock is sourced from reputable suppliers and is thoroughly tested to ensure it meets our strict quality standards. You can trust us to deliver reliable and consistent products that meet or exceed your expectations.

Do you have questions about 321 stainless steel round bar? Just contact our highly skilled personnel in O’Hare Precision Metals. We are dedicated to providing smooth-flow service. You can easily call right now and know more about a variety of products.

Request a quote for round bar stocks!