SAE-AISI 1018 Steel vs. Titanium 4-4-2
SAE-AISI 1018 steel belongs to the iron alloys classification, while titanium 4-4-2 belongs to the titanium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 1018 steel and the bottom bar is titanium 4-4-2.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 110 |
| Elongation at Break, % | 17 to 27 | |
| 10 |
| Fatigue Strength, MPa | 180 to 270 | |
| 590 to 620 |
| Poisson's Ratio | 0.29 | |
| 0.32 |
| Reduction in Area, % | 45 to 57 | |
| 20 |
| Shear Modulus, GPa | 73 | |
| 42 |
| Shear Strength, MPa | 280 to 300 | |
| 690 to 750 |
| Tensile Strength: Ultimate (UTS), MPa | 430 to 480 | |
| 1150 to 1250 |
| Tensile Strength: Yield (Proof), MPa | 240 to 400 | |
| 1030 to 1080 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 310 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1610 |
| Melting Onset (Solidus), °C | 1420 | |
| 1560 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 540 |
| Thermal Conductivity, W/m-K | 52 | |
| 6.7 |
| Thermal Expansion, µm/m-K | 12 | |
| 8.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.8 | |
| 39 |
| Density, g/cm3 | 7.9 | |
| 4.7 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 30 |
| Embodied Energy, MJ/kg | 18 | |
| 480 |
| Embodied Water, L/kg | 46 | |
| 180 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 75 to 100 | |
| 110 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 150 to 430 | |
| 4700 to 5160 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 34 |
| Strength to Weight: Axial, points | 15 to 17 | |
| 68 to 74 |
| Strength to Weight: Bending, points | 16 to 17 | |
| 52 to 55 |
| Thermal Diffusivity, mm2/s | 14 | |
| 2.6 |
| Thermal Shock Resistance, points | 14 to 15 | |
| 86 to 93 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 3.0 to 5.0 |
| Carbon (C), % | 0.15 to 0.2 | |
| 0 to 0.080 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 98.8 to 99.25 | |
| 0 to 0.2 |
| Manganese (Mn), % | 0.6 to 0.9 | |
| 0 |
| Molybdenum (Mo), % | 0 | |
| 3.0 to 5.0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.050 |
| Oxygen (O), % | 0 | |
| 0 to 0.25 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Silicon (Si), % | 0 | |
| 0.3 to 0.7 |
| Sulfur (S), % | 0 to 0.050 | |
| 0 |
| Tin (Sn), % | 0 | |
| 1.5 to 2.5 |
| Titanium (Ti), % | 0 | |
| 85.8 to 92.2 |
| Residuals, % | 0 | |
| 0 to 0.4 |