AISI Type 321 Stainless Steel, annealed sheet

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

Component    Wt. % C 0.08   Cr 18   Fe 68

Component    Wt. % Mn 2   Ni 11   P 0.045

Component    Wt. % S 0.03   Si 1   Ti 0.15

Material Notes:
Titanium-bearing, austenitic, chromium-nickel steel. Stabilized against carbide precipitation and designed to work within the temperature range where carbide precipitation develops. 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.

Physical Properties	Metric	English	Comments
Density	8 g/cc	0.289 lb/in³
Mechanical Properties
Hardness, Rockwell B	80	80
Tensile Strength, Ultimate	620 MPa	89900 psi
Tensile Strength, Yield	240 MPa	34800 psi
Elongation at Break	45 %	45 %	in 50 mm
Modulus of Elasticity	193 - 200 GPa	28000 - 29000 ksi
Charpy Impact	165 J	122 ft-lb	V-notch
Izod Impact	135 J	99.6 ft-lb
Electrical Properties
Electrical Resistivity	7.2e-005 ohm-cm	7.2e-005 ohm-cm	at 20ºC
Magnetic Permeability	1.008	1.008	at RT
Thermal Properties
CTE, linear 20°C	16.7 µm/m-°C	9.28 µin/in-°F	0 - 100ºC
CTE, linear 250°C	17.1 µm/m-°C	9.5 µin/in-°F	at 0-315°C (32-600°F)
CTE, linear 500°C	18.5 µm/m-°C	10.3 µin/in-°F	0 - 540ºC
CTE, linear 1000°C	20.5 µm/m-°C	11.4 µin/in-°F	20 - 925ºC
Specific Heat Capacity	0.5 J/g-°C	0.12 BTU/lb-°F	from 0-100°C (32-212°F)
Thermal Conductivity at Elevated Temperature	16.1 W/m-K	112 BTU-in/hr-ft²-°F	100ºC
Melting Point	1400 - 1425 °C	2550 - 2600 °F
Solidus	1400 °C	2550 °F
Liquidus	1425 °C	2600 °F
Maximum Service Temperature, Air	870 °C	1600 °F	Intermittent Service
Maximum Service Temperature, Air	925 °C	1700 °F	Continuous Service

References for this datasheet.