ASTM A302 Alloy Steel vs. Austempered Cast Iron
Both ASTM A302 alloy steel and austempered cast iron are iron alloys. There are 26 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is ASTM A302 alloy steel and the bottom bar is austempered cast iron.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 180 to 190 | |
| 270 to 490 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 180 |
| Elongation at Break, % | 20 to 23 | |
| 1.1 to 13 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 62 to 69 |
| Tensile Strength: Ultimate (UTS), MPa | 590 to 620 | |
| 860 to 1800 |
| Tensile Strength: Yield (Proof), MPa | 350 to 390 | |
| 560 to 1460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 280 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1380 |
| Melting Onset (Solidus), °C | 1420 | |
| 1340 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 490 |
| Thermal Conductivity, W/m-K | 39 to 51 | |
| 42 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.4 to 3.0 | |
| 2.9 |
| Density, g/cm3 | 7.8 to 7.9 | |
| 7.5 |
| Embodied Carbon, kg CO2/kg material | 1.5 to 1.6 | |
| 1.8 |
| Embodied Energy, MJ/kg | 20 to 21 | |
| 25 |
| Embodied Water, L/kg | 48 to 50 | |
| 48 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 120 | |
| 19 to 95 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 330 to 410 | |
| 880 to 3970 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 21 to 22 | |
| 32 to 66 |
| Strength to Weight: Bending, points | 20 to 21 | |
| 27 to 44 |
| Thermal Diffusivity, mm2/s | 10 to 14 | |
| 11 |
| Thermal Shock Resistance, points | 17 to 18 | |
| 25 to 53 |