ASTM A240 AISI 321 Stainless Steel Sheet X10CrNiTi189 Inox Sheet
- AMS 5510
- AMS 5645
- UNS S32100
- ASTM A 167
- PWA-LCS
- GE-S400/1000
- RR SABRe Edition 2
- DFARS Compliant
Common Trade Names
- ATI 321 (™ Allegheny Technologies)
Common Applications of 321 Stainless Steel
- Aircraft exhaust stacks
- Manifolds
- Chemical processing equipment
- Welded equipment
- Jet engine parts
Inventory Size Range
- Sheet : 0.011" - 0.130"
- Bar : 0.375" - 9.000"
- Hex Bar : 0.4375" - 1.125"
- Plate : 0.250"
Please contact us for more details.
The technical data provided is for information only and not for design purposes. It is not warranted or guaranteed.
321 Chemical Composition
| Element | Maximum Unless Range is Specified |
| 321 | 347 |
| Carbon | 0.08 | 0.08 |
| Manganese | 2.00 | 2.00 |
| Phosphorus | 0.045 | 0.045 |
| Sulfur | 0.030 | 0.030 |
| Silicon | 0.75 | 0.75 |
| Chromium | 17.00-19.00 | 17.00-19.00 |
| Nickel | 9.00-12.00 | 9.00-13.00 |
| Columbium+Tantalum | - | 10xC min to 1.00 max |
| Titanium | 5x(C+N) min to 0.70 max | - |
| Nitrogen | 0.10 | - |
| Iron | Balance | Balance |
321 Physical Properties
| Grade | Density | Modulus of Elasticity in Tension | Melting Range |
| g/cm3 | lb/in3 |
| 321 | 7.92 | 0.286 | 28 x 106 psi
193 GPa | 1398-1446°C
2550-2635°F |
| 347 | 7.96 | 0.288 | 28 x 106 psi
193 GPa | 1398-1446°C
2550-2635°F |
Mean Coefficient of Linear Thermal Expansion
| Temperature Range | Coefficients |
| °C | °F | cm/cm/°C | in/in/°F |
| 20-100 | 68-212 | 16.6 x 10-6 | 9.2 x 10-6 |
| 20-600 | 68-912 | 18.9 x 10-6 | 10.5 x 10-6 |
| 20-1000 | 68-1832 | 20.5 x 10-6 | 101.4 x 10-6 |
Thermal Conductivity
| Temperature Range | W/m·K | Btu · in / hr · ft2 · °F |
| °C | °F |
| 20-100 | 68-212 | 16.3 | 112.5 |
| 20-500 | 68-932 | 21.4 | 147.7 |
Specific Heat
| Temperature Range | J/kg K | Btu/lb · °F |
| °C | °F |
| 0-100 | 32-212 | 500 | 0.12 |
Magnetic Permeability
Electrical Resistivity
| Temperature Range | microhm·cm |
| °C | °F |
| 20 | 68 | 72 |
| 100 | 213 | 78 |
| 200 | 392 | 86 |
| 400 | 752 | 100 |
| 600 | 1112 | 111 |
| 800 | 1472 | 121 |
| 900 | 1652 | 126 |
Mechanical Properties and Yield Strength of 321
| Property | Type 321 | Type 347 |
Yield Strength, 0.2% Offset
psi
MPa | 30,000
205 | 30,000
205 |
Ultimate Tensile Strength,
psi
MPa | 75,000
515 | 75,000
515 |
| Percent Elongation in 2 in. or 51 mm | 40.0 | 40.0 |
Hardness, Max.,
Brinell (Plate)
RB (Sheet & Strip) | 217
95 | 201
92 |
