AK Steel 321 Austenitic Stainless steel

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AK Steel 321 Austenitic Stainless steel
Categories:	Metal; Ferrous Metal; Austenitic; Stainless Steel; T 300 Series Stainless Steel
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
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Physical Properties	Metric	English	Comments

Density	9.01 g/cc	0.326 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell B	80	80
Tensile Strength, Ultimate	621 MPa	90100 psi
Tensile Strength, Yield	276 MPa @Strain 0.2 %	40000 psi @Strain 0.2 %
Elongation at Break	45 %	45 %	in 2 inches
Tensile Modulus	193 GPa	28000 ksi
Poissons Ratio	0.24	0.24	Calculated
Shear Modulus	78.0 GPa	11300 ksi	torsion

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000720 ohm-cm	0.0000720 ohm-cm
Magnetic Permeability	<= 1.02	<= 1.02	H = 200 Oersted, Annealed

Thermal Properties	Metric	English	Comments
CTE, linear	16.6 µm/m-°C @Temperature 0.000 - 100 °C	9.22 µin/in-°F @Temperature 32.0 - 212 °F
	20.2 µm/m-°C @Temperature <=871 °C	11.2 µin/in-°F @Temperature <=1600 °F
Specific Heat Capacity	0.500 J/g-°C @Temperature 0.000 - 100 °C	0.120 BTU/lb-°F @Temperature 32.0 - 212 °F
Thermal Conductivity	16.0 W/m-K @Temperature 100 °C	111 BTU-in/hr-ft²-°F @Temperature 212 °F
	22.0 W/m-K @Temperature 500 °C	153 BTU-in/hr-ft²-°F @Temperature 932 °F
Melting Point	1371 - 1399 °C	2500 - 2550 °F
Solidus	1371 °C	2500 °F
Liquidus	1399 °C	2550 °F
Maximum Service Temperature, Air	816 °C	1500 °F

Component Elements Properties	Metric	English	Comments
Carbon, C	<= 0.080 %	<= 0.080 %
Chromium, Cr	17 - 19 %	17 - 19 %
Iron, Fe	65.295 - 74 %	65.295 - 74 %	As Remainder
Manganese, Mn	<= 2.0 %	<= 2.0 %
Nickel, Ni	9.0 - 12 %	9.0 - 12 %
Nitrogen, N	<= 0.10 %	<= 0.10 %
Phosphorus, P	<= 0.045 %	<= 0.045 %
Silicon, Si	<= 0.75 %	<= 0.75 %
Sulfur, S	<= 0.030 %	<= 0.030 %
Titanium, Ti	<= 0.70 %	<= 0.70 %

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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NAKS114 / 14717

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