Features To Consider When Choosing 321 Stainless Steel Bar


Stainless steel, in various grades and compositions, is used in a wide variety of manufacturing and aerospace industries. 321 stainless steel bar, which may also be designated as Grade 321 or by the UNS designation of S32100, contains a combination of different materials.

These materials, which will vary slightly in actual percentages, include chromium, nickel, silicon, manganese, titanium, sulfur and phosphorus and iron. The resulting finished 321 stainless steel bar is highly corrosive resistant as well as durable, strong and very resistant to scaling. This stainless steel can be welded, making it a very practical material for many types of uses.

Uses for 321 Stainless Steel

Using 321 stainless steel bar or sheeting it is a good option for a number of different applications. It is an essential component in most type of industries, especially those that require exposure to high levels of heat. 321 stainless steel bar is used in chemical processing equipment, heating and furnace parts and components, jet engines and afterburners, aircraft exhaust, manifolds, and most types of high temperature refinery machines and equipment. It is not commonly used for any type of decorative parts or uses since it is not a stainless steel that can be easily polished to a lustrous finish.

There is also a 321H stainless steel that is used for much higher temperatures. The difference between the two is that the 321H has approximately five times the carbon content, providing for better durability even at very high temperature extremes.

Customized Sizing of 321 Stainless Steel Bars

Depending on the manufacturer or supplier, 321 stainless steel bar can come in a variety of different sizes as well as shapes. It is possible to have bars set to different form specifications including rounds, hexagons, squares and rectangles. The shape will determine the sizes possible with the rounds starting as small as 1/16th of an inch and all other shapes starting at 1/8th of an inch and up. With a number of choices including 405 Stainless Steel, 321 Stainless Steel bar options and 321 Stainless Steel Tube selections, one-stop shopping is possible.


When choosing a provider for 321 stainless steel bars or sheeting it is important to confirm if certification is available and what standards are used. Top companies and manufacturers will typically provide certification and guarantee for all of their products to the industry standard and required governmental regulations.