SAE-AISI 4150 Steel vs. SAE-AISI 1045 Steel
Both SAE-AISI 4150 steel and SAE-AISI 1045 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 4150 steel and the bottom bar is SAE-AISI 1045 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 200 to 380 | |
| 180 to 190 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 12 to 20 | |
| 13 to 18 |
| Fatigue Strength, MPa | 260 to 780 | |
| 220 to 370 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 72 |
| Shear Strength, MPa | 410 to 800 | |
| 380 to 410 |
| Tensile Strength: Ultimate (UTS), MPa | 660 to 1310 | |
| 620 to 680 |
| Tensile Strength: Yield (Proof), MPa | 380 to 1220 | |
| 330 to 580 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 420 | |
| 400 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 42 | |
| 51 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.3 | |
| 7.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.4 | |
| 8.1 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.4 | |
| 1.8 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 1.4 |
| Embodied Energy, MJ/kg | 20 | |
| 18 |
| Embodied Water, L/kg | 51 | |
| 46 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 82 to 180 | |
| 84 to 93 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 380 to 3930 | |
| 300 to 900 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 24 to 47 | |
| 22 to 24 |
| Strength to Weight: Bending, points | 22 to 34 | |
| 21 to 22 |
| Thermal Diffusivity, mm2/s | 11 | |
| 14 |
| Thermal Shock Resistance, points | 19 to 39 | |
| 20 to 22 |
Alloy Composition
| Carbon (C), % | 0.48 to 0.53 | |
| 0.43 to 0.5 |
| Chromium (Cr), % | 0.8 to 1.1 | |
| 0 |
| Iron (Fe), % | 96.7 to 97.7 | |
| 98.5 to 99 |
| Manganese (Mn), % | 0.75 to 1.0 | |
| 0.6 to 0.9 |
| Molybdenum (Mo), % | 0.15 to 0.25 | |
| 0 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.040 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 to 0.050 |