Hot Finished AISI 309 vs. Hot Rolled SAE-AISI 1090
Both hot finished AISI 309 and hot rolled SAE-AISI 1090 are iron alloys. Both are furnished in the hot worked condition. They have 63% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is hot finished AISI 309 and the bottom bar is hot rolled SAE-AISI 1090.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 180 | |
| 280 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 47 | |
| 11 |
| Fatigue Strength, MPa | 250 | |
| 320 |
| Poisson's Ratio | 0.27 | |
| 0.29 |
| Shear Modulus, GPa | 78 | |
| 72 |
| Shear Strength, MPa | 420 | |
| 570 |
| Tensile Strength: Ultimate (UTS), MPa | 600 | |
| 950 |
| Tensile Strength: Yield (Proof), MPa | 260 | |
| 520 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 240 |
| Maximum Temperature: Mechanical, °C | 980 | |
| 400 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1450 |
| Melting Onset (Solidus), °C | 1400 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 16 | |
| 50 |
| Thermal Expansion, µm/m-K | 15 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.2 | |
| 7.1 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.5 | |
| 8.2 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 19 | |
| 1.8 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 3.6 | |
| 1.4 |
| Embodied Energy, MJ/kg | 51 | |
| 19 |
| Embodied Water, L/kg | 170 | |
| 46 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 230 | |
| 91 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 170 | |
| 730 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 21 | |
| 34 |
| Strength to Weight: Bending, points | 20 | |
| 27 |
| Thermal Diffusivity, mm2/s | 4.3 | |
| 13 |
| Thermal Shock Resistance, points | 14 | |
| 31 |
Alloy Composition
| Carbon (C), % | 0 to 0.2 | |
| 0.85 to 1.0 |
| Chromium (Cr), % | 22 to 24 | |
| 0 |
| Iron (Fe), % | 58 to 66 | |
| 98 to 98.6 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0.6 to 0.9 |
| Nickel (Ni), % | 12 to 15 | |
| 0 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.75 | |
| 0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.050 |