SAE 303 Stainless Steel (Annealed bar) vs SAE 304 Stainless Steel (Annealed bar)
Property comparison of SAE 303 Stainless Steel (Annealed bar) and SAE 304 Stainless Steel (Annealed bar), both stainless steel.
| Property | SAE 303 Stainless Steel (Annealed bar) | SAE 304 Stainless Steel (Annealed bar) | Difference |
|---|---|---|---|
| Yield strength | 240 MPa | 235 MPa | -2% |
| Tensile strength | 620 MPa | 585 MPa | -6% |
| Elongation | 50 % | 60 % | +20% |
| 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 | 160 HB | 149 HB | -7% |
| Thermal conductivity | 15.1 W/m·K | 15.1 W/m·K | 0% |
| Specific heat | 460 J/kg·K | 460 J/kg·K | 0% |
| Coefficient of thermal expansion | 0.000016 1/K | 0.000016 1/K | 0% |
| Melting point | 1,400 °C | 1,400 °C | 0% |
| Reduction in area | 55 % | 70 % | +27% |
Difference is SAE 304 Stainless Steel (Annealed bar) relative to SAE 303 Stainless Steel (Annealed bar). 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
- 303
- standard
- SAE
- heat treatment
- Annealed bar
- grade
- 304
- standard
- SAE
- heat treatment
- Annealed bar
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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