Stainless Steel 321
- UNS S32100
- ASTM A 240, A 479, A 276, A 312
- AMS 5510, AMS 5645
- EN 1.4541, Werkstoff 1.4541
- 321 stainless steel coiled tubing and capillary tubing
Stainless 321 Chemical Composition, %
| Cr | Ni | Mo | Ti | C | Mn | Si | P | S | N | Fe | |
|---|---|---|---|---|---|---|---|---|---|---|---|
|
MIN
|
17.0
|
9.0
|
-
|
5x(C+N)
|
-
|
-
|
0.25
|
-
|
-
|
-
|
-
|
|
MAX
|
19.0
|
12.0
|
0.75
|
0.70
|
0.08
|
2.0
|
1.0
|
0.045
|
0.03
|
0.1
|
Bal
|
What applications use 321 Stainless Steel?
321 stainless steel coiled tubing and capillary tubing
- Aircraft piston engine manifolds
- Expansion joints
- Thermal oxidizers
- Refinery equipment
- High temperature chemical process equipment
- Food Processing
Mechanical Properties
Average Elevated Temperature Tensile Properties
| Temperature, °F | Ultimate Tensile Strength, ksi | .2% Yield Strength, ksi |
|---|---|---|
|
68
|
93.3
|
36.5
|
|
400
|
73.6
|
36.6
|
|
800
|
69.5
|
29.7
|
|
1000
|
63.5
|
27.4
|
|
1200
|
52.3
|
24.5
|
|
1350
|
39.3
|
22.8
|
|
1500
|
26.4
|
18.6
|
Welding Stainless Steel 321
321 stainless steel coiled tubing and capillary tubing
321 Stainless is readily welded by all common methods including submerged arc. Appropriate weld fillers are most often specified as AWS E/ER 347 or E/ER 321.
This alloy is generally considered to have comparable weldability to 304 and 304L stainless with the main difference being the titanium addition which reduces or prevents carbide precipitation during welding.
Post time: Jun-27-2023