321 Stainless Steel Alloy

UNS: S32100
EN-DIN: 1.4541


321 Stainless Steel Strip, Coil & Sheet

  • AMS 5510
  • ASTM A240

Our wide capabilities give us a unique ability to supply all of your 321 stainless steel strip, coil, and sheet needs.

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321 Stainless Steel Alloy Description:

321 grade stainless has excellent resistance to oxidation and corrosion and possesses good creep strength. Type 321 is a stabilized austenitic stainless steel similar to type 304 but with titanium addition used in applications involving continuous or intermittent service at 800-1500 oF (427-816 oC).


321 Stainless Steel Alloy Uses & Applications:

  • Annealing covers
  • High-temperature tempering equipment
  • Diesel and heavy duty automotive exhaust systems, firewalls
  • Stack liners

Nominal Composition


Physical Properties

At 70°FAt 20°C
Density0.29 lb./in³8.09 g/cm³
Modulus of Elasticity (E)28.0 x 10³ ksi in tension193 x 10³MPa in tension
Coefficient of Expansion9.2 x 10⁻⁶ microinches/in.-°F (32-212°F)16.6 μm/m-°C (0-100°C)
Electrical Resistivity28.4 μ ohm.in72 μ ohm.cm
Thermal Conductivity9.3 Btu-in./ft.²hr.-°F (100°C)16.0 W/m-K (100°C)
Typical Room Temperature Mechanical Properties

Typical Mechanical Properties

Typical mechanical properties are based on AK source, ASTM A240.

ConditionTensile Strength Min (UTS)0.2% YS MinElongation% in 2” Min (50.8 mm)Hardness Rockwell
Annealed85 ksi (586 MPa)35 ksi (241 MPa)55%70 HRBW
Limitation of Liability and Disclaimer of Warranty:
  • The content in these data sheets is provided primarily by third-party melting mills and is provided for reference only. It is not intended for engineering or design.
  • Applications may be discussed, however, Combined Metals Company, LLC, does not recommend or endorse any material for any particular end use or application.
  • The data included in this data sheet are typical values and may vary.
  • Combined Metals Company, LLC, makes no representations or warranties, express or implied, as to the accuracy, completeness, condition, suitability, performance, fitness for a particular purpose, or merchantability of any information contained in any data sheet.

In no event will Combined Metals Company, LLC, be liable for any damages whatsoever arising from the use of the information included in the data sheets.

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