321 Stainless Steel, annealed and cold drawn bar, 25 mm diam.

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321 Stainless Steel, annealed and cold drawn bar, 25 mm diam.
Categories:	Metal; Ferrous Metal; Stainless Steel; T 300 Series Stainless Steel
Material Notes:	Similar to Type 304 except Ti content helps prevent chromium carbide precipitation resulting from welding or elevated temperatures. Stabilized at annealing temperatures between 950-1010°C (1750-1850°F). Resists scaling and vibration fatigue. Applications include aircraft exhaust stacks and manifolds, chemical processing equipment, weld equipment, jet engine parts.
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Physical Properties	Metric	English	Comments

Density	8.00 g/cc	0.289 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	185	185
Hardness, Knoop	207	207	Converted from Brinell
Hardness, Rockwell B	90	90
Hardness, Vickers	194	194	Converted from Brinell
Tensile Strength, Ultimate	655 MPa	95000 psi
Tensile Strength, Yield	415 MPa	60200 psi
Elongation at Break	40 %	40 %	in 50 mm
Modulus of Elasticity	193 - 200 GPa	28000 - 29000 ksi
Izod Impact	135 J	99.6 ft-lb
Charpy Impact	165 J	122 ft-lb	V-notch

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000720 ohm-cm	0.0000720 ohm-cm	at 20ºC

Thermal Properties	Metric	English	Comments
CTE, linear	16.7 µm/m-°C @Temperature 0.000 - 100 °C	9.28 µin/in-°F @Temperature 32.0 - 212 °F
	17.1 µm/m-°C @Temperature 0.000 - 315 °C	9.50 µin/in-°F @Temperature 32.0 - 599 °F
	18.5 µm/m-°C @Temperature 0.000 - 540 °C	10.3 µin/in-°F @Temperature 32.0 - 1000 °F
	20.5 µm/m-°C @Temperature 20.0 - 925 °C	11.4 µin/in-°F @Temperature 68.0 - 1700 °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	16.1 W/m-K @Temperature 100 °C	112 BTU-in/hr-ft²-°F @Temperature 212 °F
Melting Point	1400 - 1425 °C	2550 - 2597 °F
Solidus	1400 °C	2550 °F
Liquidus	1425 °C	2597 °F
Maximum Service Temperature, Air	870 °C	1600 °F	Continuous Service
	925 °C	1700 °F	Intermittent

Component Elements Properties	Metric	English	Comments
Carbon, C	<= 0.080 %	<= 0.080 %
Chromium, Cr	17 - 19 %	17 - 19 %
Iron, Fe	65.45 - 73.6 %	65.45 - 73.6 %	As Balance
Manganese, Mn	<= 2.0 %	<= 2.0 %
Nickel, Ni	9.0 - 12 %	9.0 - 12 %
Phosphorus, P	<= 0.045 %	<= 0.045 %
Silicon, Si	<= 1.0 %	<= 1.0 %
Sulfur, S	<= 0.030 %	<= 0.030 %
Titanium, Ti	0.40 %	0.40 %	Minimum Ti content = 5 x Carbon content

References for this datasheet.

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MQ321E / 12819

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