SAE 321 Stainless Steel (Annealed sheet) vs SAE 384 Stainless Steel (Annealed wire 1040 °C (1900 °F))
Property comparison of SAE 321 Stainless Steel (Annealed sheet) and SAE 384 Stainless Steel (Annealed wire 1040 °C (1900 °F)), both stainless steel.
| Property | SAE 321 Stainless Steel (Annealed sheet) | SAE 384 Stainless Steel (Annealed wire 1040 °C (1900 °F)) | Difference |
|---|---|---|---|
| Yield strength | 240 MPa | 240 MPa | 0% |
| Tensile strength | 620 MPa | 515 MPa | -17% |
| Elongation | 45 % | 55 % | +22% |
| Elastic modulus | 193,000 MPa | 193,000 MPa | 0% |
| Shear modulus | 74,231 MPa | 74,231 MPa | 0% |
| Poisson ratio | 0.3 | 0.3 | 0% |
| Density | 7,850 kg/m³ | 7,850 kg/m³ | 0% |
| Brinell hardness | 147 HB | 121 HB | -18% |
| Thermal conductivity | 15.1 W/m·K | 15.1 W/m·K | 0% |
| Specific heat | 460 J/kg·K | 500 J/kg·K | +9% |
| Coefficient of thermal expansion | 0.000016 1/K | 0.000016 1/K | 0% |
| Melting point | 1,400 °C | 1,400 °C | 0% |
Difference is SAE 384 Stainless Steel (Annealed wire 1040 °C (1900 °F)) relative to SAE 321 Stainless Steel (Annealed sheet). Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
- grade
- 321
- standard
- SAE
- heat treatment
- Annealed sheet
- grade
- 384
- standard
- SAE
- heat treatment
- Annealed wire 1040 °C (1900 °F)
About 300-series stainless steels
Austenitic stainless steels gain corrosion resistance from chromium and nickel and are non-magnetic in the annealed condition. 304 covers most general-purpose work; 316 adds molybdenum for chloride and seawater service. They cannot be hardened by heat treatment and rely on cold work for higher strength.
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