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

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

Component    Wt. % C 0.08   Cr 17   Fe 69

Component    Wt. % Mn 2   Ni 11   P 0.045

Component    Wt. % S 0.03   Si 1   Ti 0.15

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.

Physical Properties	Metric	English	Comments
Density	8 g/cc	0.289 lb/in³
Mechanical Properties
Hardness, Brinell	185	185
Hardness, Knoop	207	207	Converted from Brinell hardness.
Hardness, Rockwell B	90	90
Hardness, Vickers	194	194	Converted from Brinell hardness.
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
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
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.