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Features
* Oxidization resistance to 1600
°F
* Stabilized against weld heat affected
zone (HAZ) intergranular corrosion
* Resists polythionic acid stress
corrosion cracking
Applications
* Thermal oxidizers
* Aircraft piston engine manifolds
* Expansion joints
* Refinery equipment
* High temperature chemical process
equipment
* LBGT exhaust ducting
Nominal Chemical
Composition
|
element
|
weight %
|
|
Nickel
|
9.3
|
|
Chromium
|
17.3
|
|
Manganese
|
1.5
|
|
Silicon
|
0.7
|
|
Titanium
|
0.4
|
|
Carbon
|
0.04
|
|
Iron
|
70
|
Specifications
UNS S32100
ASTM A 240, A 276, A 479
ASME SA-240, SA-479
AMS 5510, 5645
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Performance Profile
321 stainless is a titanium stabilized grade
commonly used for service in the 1000-1600 °F
temperature range. For service temperatures up to
about 1600 °F, a stabilizing treatment at
1550-1650 F, air cool, may be used to provide
optimum resistance to intergranular corrosion and
to polythionic acid stress corrosion cracking. 321
is readily welded by all common methods including
submerged arc. Appropriate weld fillers are AWS
ER347 bare wire and E347 covered electrodes.
Mechanical Properties
Representative Tensile Properties
|
Temp °F
|
Ultimate Tensile Strength,
psi
|
0.2% Yield Strength, psi
|
|
RT
|
84,000
|
38,000
|
|
400
|
62,000
|
20,500
|
|
600
|
62,000
|
18,000
|
|
800
|
62,000
|
17,000
|
|
1000
|
59,500
|
16,500
|
|
1200
|
45,500
|
16,000
|
|
1400
|
27,500
|
14,000
|
Typical Creep-Rupture Properties
|
Temp °F
|
Stress, psi, for a Secondary Creep
Rate 1% in 10,000 hrs
|
10,000 hr Rupture Strength,
psi
|
|
1050
|
30,000
|
31,000
|
|
1100
|
20,000
|
23,500
|
|
1200
|
8,800
|
12,900
|
|
1300
|
3,850
|
7,200
|
|
1400
|
1,700
|
4,000
|
|
1500
|
750
|
2,280
|
Physical Properties
|
Density Iblin3
0.286
|
Melting Range °F
2550-2600
|
|
Temp °F
|
Coefficient* of Thermal Expansion,
in/in°F x 10-6
|
Thermal Conductivity
Btu•ft/ft2•hr•°F
|
Modulus of Elasticity Dynamic, psi
x 106
|
|
200
|
9.3
|
8.8
|
28.0
|
|
400
|
9.4
|
9.7
|
26.5
|
|
800
|
10.0
|
11.4
|
23.8
|
|
1000
|
10.3
|
12.1
|
22.5
|
|
1200
|
10.6
|
-
|
21.2
|
|
1400
|
10.9
|
-
|
19.7
|
|
1600
|
11.1
|
-
|
-
|
* 70 °F to indicated temperature.
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