Technical Data Sheet
Type 321 is a chromium-nickel stainless steel and with the addition of titanium, type 321 is resistant to intergranular corrosion. Type 321\’s general corrosion is less than Type 302. Type 321 is used where resistance to intergranular corrosion is required and where the parts are subjected to sustained heating or cooling within the range of 800 to 1500ºF. Type 321 is commonly used in applications such as exhaust stacks, manifolds and ring collectors.
| Chemical Composition Limits | |||||||||||
| Weight% | C | Si | Mn | P+S | Cr | Ni | Ti | N | Fe | Cu | Mo |
| AMS 5510 Alloy 321 |
0.08 max | 0.25-1.00 | 2.0 max | 0.040P 0.030S |
17-19 | 9-12 | 0.7 max | 0.1 max | Bal | 0.75 max | 0.75 max |
Typical Mechanical Properties
| Material | Condition | Tensile Strength (ksi) | Yield Strength (ksi) |
% Elongation | Hardness HB |
| Alloy 321 AMS 5510 |
AMS 5510 Sheet (Sol Trtd) | 70-100 | 25 | 40 | – |
| Alloy 321 AMS 5645 |
AMS 5645 Bar (Sol Trtd) | – | – | – | 255 max |
Availability
Type 321 is available in Sheet, Strip, Plate, Bar (Round, Hex, Flat, Square), Tube and Forging Stock. 321 Foil (Shim) is available in various thicknesses. View stock list for further information. Foil Stock List, Sheet Stock List , Plate Stock List for all availability contact Sales.
Specifications
AMS 5510 Sheet / strip / plate
AMS 5557 Welded/seamless tube
AMS 5559 Welded / thin wall tube
AMS 5570 Seamless tube
AMS 5576 Welded tube
AMS 5645 Bars / wire / forging
MIL-S-6721
MIL-T-8606 Seamless tube
MIL-T-8606 Welded tube
MIL-T-8808 Seamless tube
MIL-T-8808 Welded tube
QQ-S-766
ASTM A240 / ASME SA240
ASTM A167 / ASME SA167
ASTM A193 Grade B8T CL1
ASTM A276 / ASME SA276
ASTM A314 / ASME SA314
ASTM A320 Grade B8T
ASTM A479 / ASME A479
ASTM A484 / ASME SA484
AISI 321
BS 2S129
BS T67 Tube
BS S524 Sheet
BS S526 Sheet
BS 970; 321S31
EN58B
WS 1.4541
Z10CnNb18-11
UNS S32100