SAE-AISI 5140 Steel vs. Grey Cast Iron
Both SAE-AISI 5140 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 5140 steel and the bottom bar is grey cast iron.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 170 to 290 | |
| 160 to 300 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 180 |
| Elongation at Break, % | 12 to 29 | |
| 9.6 |
| Fatigue Strength, MPa | 220 to 570 | |
| 69 to 170 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 69 |
| Shear Strength, MPa | 360 to 600 | |
| 180 to 610 |
| Tensile Strength: Ultimate (UTS), MPa | 560 to 970 | |
| 160 to 450 |
| Tensile Strength: Yield (Proof), MPa | 290 to 840 | |
| 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 | 45 | |
| 46 |
| Thermal Expansion, µm/m-K | 13 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 8.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.1 | |
| 1.9 |
| Density, g/cm3 | 7.8 | |
| 7.5 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 1.5 |
| Embodied Energy, MJ/kg | 19 | |
| 21 |
| Embodied Water, L/kg | 49 | |
| 44 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 76 to 180 | |
| 13 to 37 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 220 to 1880 | |
| 27 to 240 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 20 to 34 | |
| 5.8 to 17 |
| Strength to Weight: Bending, points | 19 to 28 | |
| 8.7 to 17 |
| Thermal Diffusivity, mm2/s | 12 | |
| 13 |
| Thermal Shock Resistance, points | 16 to 29 | |
| 6.0 to 17 |
Alloy Composition
| Carbon (C), % | 0.38 to 0.43 | |
| 3.1 to 3.4 |
| Chromium (Cr), % | 0.7 to 0.9 | |
| 0 |
| Iron (Fe), % | 97.3 to 98.1 | |
| 92.1 to 93.9 |
| Manganese (Mn), % | 0.7 to 0.9 | |
| 0.5 to 0.7 |
| 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 |