Grey Cast Iron vs. SAE-AISI 8620 Steel
Both grey cast iron and SAE-AISI 8620 steel are iron alloys. They have a moderately high 94% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.
For each property being compared, the top bar is grey cast iron and the bottom bar is SAE-AISI 8620 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 160 to 300 | |
| 150 to 210 |
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 190 |
| Elongation at Break, % | 9.6 | |
| 13 to 31 |
| Fatigue Strength, MPa | 69 to 170 | |
| 270 to 360 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 69 | |
| 73 |
| Shear Strength, MPa | 180 to 610 | |
| 340 to 420 |
| Tensile Strength: Ultimate (UTS), MPa | 160 to 450 | |
| 520 to 690 |
| Tensile Strength: Yield (Proof), MPa | 98 to 290 | |
| 360 to 570 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 250 |
| Melting Completion (Liquidus), °C | 1380 | |
| 1460 |
| Melting Onset (Solidus), °C | 1180 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 470 |
| Thermal Conductivity, W/m-K | 46 | |
| 39 |
| Thermal Expansion, µm/m-K | 11 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.4 | |
| 7.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.9 | |
| 8.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 | |
| 2.6 |
| Density, g/cm3 | 7.5 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 1.5 |
| Embodied Energy, MJ/kg | 21 | |
| 20 |
| Embodied Water, L/kg | 44 | |
| 50 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 13 to 37 | |
| 86 to 150 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 27 to 240 | |
| 340 to 880 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 5.8 to 17 | |
| 18 to 24 |
| Strength to Weight: Bending, points | 8.7 to 17 | |
| 18 to 22 |
| Thermal Diffusivity, mm2/s | 13 | |
| 10 |
| Thermal Shock Resistance, points | 6.0 to 17 | |
| 15 to 20 |
Alloy Composition
| Carbon (C), % | 3.1 to 3.4 | |
| 0.18 to 0.23 |
| Chromium (Cr), % | 0 | |
| 0.4 to 0.6 |
| Iron (Fe), % | 92.1 to 93.9 | |
| 96.9 to 98 |
| Manganese (Mn), % | 0.5 to 0.7 | |
| 0.7 to 0.9 |
| Molybdenum (Mo), % | 0 | |
| 0.15 to 0.25 |
| Nickel (Ni), % | 0 | |
| 0.4 to 0.7 |
| Phosphorus (P), % | 0 to 0.9 | |
| 0 to 0.035 |
| Silicon (Si), % | 2.5 to 2.8 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 to 0.15 | |
| 0 to 0.040 |