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321 Stainless Steel

321 stainless steel is a popular choice for applications requiring high corrosion resistance and high temperatures.

Non-magnetic and heat resistant 321 Stainless Steel

321 stainless steel is a titanium stabilized austenitic steel that has improved resistance towards intergranular corrosion. It is suitable for high-temperature applications of up to 1500F, as the addition of titanium stabilizes this bars against chromium carbide formation.

Not only that, it has higher creep and stress rupture properties, making it the ideal steel for pressure vessels and boiler applications. This type of steel is non-magnetic and heat resistant, allowing continuous service at elevated temperatures. Although this steel cannot be hardened through heat treatment, you can use hard work to set it. 

At the same time, the 321 stainless steel is easily welded through all standard methods, and post-weld annealing is not a requirement. This steel has excellent corrosion resistance, especially against dilute organic acids, but it is unsuitable for chloride solutions as it becomes susceptible to crevice and pitting corrosion.

Steel Purchaser

321 Stainless Steel Wire Applications

321 stainless steel wire is a high-performance material that is commonly used in various industries due to its exceptional corrosion resistance, high-temperature strength, and excellent mechanical properties. Here are some of the most common applications of 321 stainless:

  • Aerospace and aviation: 321 stainless steel wire is often used in the aerospace industry for its high-temperature strength and excellent resistance to corrosion. It is commonly used in aircraft engines, exhaust systems, and other high-temperature applications.
  • Petrochemical and chemical processing: The excellent corrosion resistance of 321 stainless wire makes it ideal for use in the petrochemical and chemical processing industries. It is often used in applications where exposure to harsh chemicals, such as acids and alkalis, is common.
  • Automotive industry: 321 stainless steel wire is commonly used in the automotive industry for its excellent corrosion resistance and high-temperature strength. It is often used in exhaust systems and other components that are exposed to high temperatures and harsh environments.
  • Medical and dental implants: It is biocompatible, making them an ideal material for use in medical and dental implants. It is often used in applications such as orthopedic implants, dental braces, and surgical instruments.
  • Food processing and packaging: The corrosion resistance of 321 stainless steel wire makes it a popular choice for use in the food processing and packaging industry. It is often used in equipment that comes into contact with acidic or salty foods, as it resists corrosion and is easy to clean.


As such, it is now understandable why this type of alloy steel is sought after getting a quick review of its components.

Consequently, its high machinability is highlighted as it is commonly combined with sulfur to further improve its machinability and make carburizing processes more effective.

With its excellent machinability, this even elevated this alloy steel’s prominence among industries.

Fortunately, Advance Grinding Services never runs out of 4140 alloy steel bars and can very much supply your needs especially if you are operating in the Illinois area!


Density 7.7-8.0
Tensile Strength 95000 psi
Yield Strength 60200 psi
Hardness (Brinell) 197
Hardness (Knoop) 219
Hardness (Rockwell) 92
Hardness (Vickers) 207
Machinability 65

Get Help from Professional 321 Stainless Steel Providers

It is crucial to seek the assistance of a professional provider when purchasing steel bar stock, particularly if you are in need of 321 stainless supplies. Professional providers possess extensive knowledge of the properties and characteristics of this type of metal and can assist you in selecting the appropriate bar stock for your specific requirements.

Moreover, these experts can advise on the best machining and fabrication techniques to optimize the performance of the bar stock in your application. Additionally, they offer a broad selection of sizes, shapes, and finishes to meet your specific needs.

At Advance Grinding, we understand that having the right type of steel is vital for your business or latest venture’s success. We take pride in offering our clients quality metals, including 321 stainless steel wire products, that they can trust. If you require the best-forged stainless steel bar in the industry, you can rely on us to provide you with top-tier, high-quality metals.

Get in touch with Advance Grinding today to receive a quote on the alloy you need. We guarantee to equip you with a robust material that will enable you to tackle any project with confidence.

Give us a call or request a quote from our website and acquire a high-quality 321 stainless steel wire and bar stocks today!