Stainless Steel 321

Do you need custom fasteners created with Stainless Steel 321? Since our inception, Vegas Fastener Group has met every challenge of providing Quality, Timely, Cost-effective solutions for specialty fastener applications. Every product is built to your specifications, using your prints if necessary.

Below are the technical specifications of the Stainless Steel 321 Bar Stock we have available to meet your needs.

AK Steel Austenitic Stainless Steel 321

Subcategory: Metal; Stainless Steel; T 300 Series Stainless Steel; Austenitic

Close Analogs: Iron content calculated as remainder

Component Wt. %
C Max 0.08
Cr 17 – 19
Fe 65.295 – 74
Mn Max 2
N Max 0.1
Ni 9 – 12
P Max 0.045
S Max 0.03
Si Max 0.75
Ti Max 0.7

Material Notes:
AK Steel 321 is a stabilized austenitic stainless steel similar to Type 304 but with a titanium addition. This titanium addition reduces or prevents carbide precipitation during welding and in 427 – 816°C service. It also improves the elevated temperature properties of the alloy. AK Steel 321 provides excellent resistance to oxidation and corrosion and possesses good creep strength. It is used primarily in applications involving continuous and intermittent service temperatures within the carbide precipitation range of 427 – 816°C.

Information provided by AK Steel

Physical Properties Metric English Comments
Density 9.01 g/cc 0.326 lb/in³
Mechanical Properties
Hardness, Rockwell B 80 80
Tensile Strength, Ultimate 621 MPa 90100 psi
Tensile Strength, Yield 276 MPa 40000 psi 0.2% YS
Elongation at Break 45 % 45 % in 2 inches
Modulus of Elasticity 193 GPa 28000 ksi tension
Modulus of Elasticity 78 GPa 11300 ksi torsion
Electrical Properties
Electrical Resistivity 7.2e-005 ohm-cm 7.2e-005 ohm-cm
Magnetic Permeability Max 1.02 Max 1.02 H = 200 Oersteds, Annealed
Thermal Properties
CTE, linear 20°C 16.6 µm/m-°C 9.22 µin/in-°F 0 to 100°C
CTE, linear 20°C 20.2 µm/m-°C 11.2 µin/in-°F to 871°C
Heat Capacity 0.5 J/g-°C 0.12 BTU/lb-°F 0°C to 100°C
Thermal Conductivity 16 W/m-K 111 BTU-in/hr-ft²-°F 100°C
Thermal Conductivity 22 W/m-K 153 BTU-in/hr-ft²-°F 500°C
Processing Properties
Melt Temperature 1371 – 1399 °C 2500 – 2550 °F