SAE-AISI 8630 Steel vs. Grey Cast Iron
Both SAE-AISI 8630 steel and grey cast iron 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 SAE-AISI 8630 steel and the bottom bar is grey cast iron.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 160 to 200 | |
| 160 to 300 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 180 |
| Elongation at Break, % | 12 to 24 | |
| 9.6 |
| Fatigue Strength, MPa | 260 to 350 | |
| 69 to 170 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 69 |
| Shear Strength, MPa | 340 to 410 | |
| 180 to 610 |
| Tensile Strength: Ultimate (UTS), MPa | 540 to 680 | |
| 160 to 450 |
| Tensile Strength: Yield (Proof), MPa | 360 to 560 | |
| 98 to 290 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 280 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1380 |
| Melting Onset (Solidus), °C | 1420 | |
| 1180 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 490 |
| Thermal Conductivity, W/m-K | 39 | |
| 46 |
| Thermal Expansion, µm/m-K | 11 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.3 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 8.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.6 | |
| 1.9 |
| Density, g/cm3 | 7.8 | |
| 7.5 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 1.5 |
| Embodied Energy, MJ/kg | 20 | |
| 21 |
| Embodied Water, L/kg | 50 | |
| 44 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 78 to 110 | |
| 13 to 37 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 340 to 840 | |
| 27 to 240 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 19 to 24 | |
| 5.8 to 17 |
| Strength to Weight: Bending, points | 19 to 22 | |
| 8.7 to 17 |
| Thermal Diffusivity, mm2/s | 10 | |
| 13 |
| Thermal Shock Resistance, points | 18 to 23 | |
| 6.0 to 17 |
Alloy Composition
| Carbon (C), % | 0.28 to 0.33 | |
| 3.1 to 3.4 |
| Chromium (Cr), % | 0.4 to 0.6 | |
| 0 |
| Iron (Fe), % | 96.8 to 97.9 | |
| 92.1 to 93.9 |
| Manganese (Mn), % | 0.7 to 0.9 | |
| 0.5 to 0.7 |
| Molybdenum (Mo), % | 0.15 to 0.25 | |
| 0 |
| Nickel (Ni), % | 0.4 to 0.7 | |
| 0 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.9 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 2.5 to 2.8 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 to 0.15 |