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Stainless Steel Plate

Alloy 321 Stainless Steel Aerospace Applications

Alloys used in aerospace applications must withstand exposure to extreme temperatures and meet high mechanical demands. Type 321 stainless steel, an austenitic alloy, is stabilized with titanium, making it resistant to intergranular attack caused by chromium carbide precipitation. When exposed to temperatures in the chromium carbide precipitation range (800 to 1500°F), type 321 stainless steel maintains its stability. As a result, alloy 321 is used throughout the aerospace industry in such components as exhaust ducts, flanges and piston engine exhaust manifolds.

Alloy 321 Stainless Steel Properties

Aircraft components, such as piston engine exhaust manifolds, are exposed to temperatures that are quite extreme. Type 321 stainless steel has proven to be a grade of steel plate that can withstand temperatures from 800 to 1500°F and resist oxidation up to 1500°F. Additional 321 stainless steel properties include enhanced creep and stress rupture resistance and excellent machinability. Type 321 stainless steel will not lose its structural integrity from the high temperatures and extreme conditions that are standard for aerospace engines, nor will durability be compromised as a result of corrosion. Comparable to Alloy 304, this stainless steel grade is not subject to intergranular attack or thermal fatigue. Type 321 stainless steel is an ideal material of construction for aerospace components, such as piston engine exhaust manifolds, exhaust ducts and flanges. See this alloy's general properties for more information on its chemical analysis, physical properties, mechanical properties, corrosion resistance, and fabrication.

Choose Sandmeyer Steel for Alloy 321 Stainless Steel Plate

Sandmeyer Steel Company is a leading supplier of 321 stainless steel plate. The company stocks type 321 stainless steel in sizes as thin as 3/16" and as thick as 4". Call (1-800-523-3663) or email ( a sales representative to obtain information on pricing, shipping, and Sandmeyer Steel's value added processes.

NOTE: The information and data in this product data sheet are accurate to the best of our knowledge and belief, but are intended for informational purposes only, and may be revised at any time without notice. Applications suggested for the materials are described only to help readers make their own evaluations and decisions, and are neither guarantees nor to be construed as express or implied warranties of suitability for these or other applications.