SAE-AISI 4340 Steel vs. Grade 5 Titanium
SAE-AISI 4340 steel belongs to the iron alloys classification, while grade 5 titanium belongs to the titanium alloys. There are 30 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 4340 steel and the bottom bar is grade 5 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 110 |
| Elongation at Break, % | 12 to 22 | |
| 8.6 to 11 |
| Fatigue Strength, MPa | 330 to 740 | |
| 530 to 630 |
| Poisson's Ratio | 0.29 | |
| 0.32 |
| Shear Modulus, GPa | 73 | |
| 40 |
| Shear Strength, MPa | 430 to 770 | |
| 600 to 710 |
| Tensile Strength: Ultimate (UTS), MPa | 690 to 1280 | |
| 1000 to 1190 |
| Tensile Strength: Yield (Proof), MPa | 470 to 1150 | |
| 910 to 1110 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 430 | |
| 330 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1610 |
| Melting Onset (Solidus), °C | 1420 | |
| 1650 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 560 |
| Thermal Conductivity, W/m-K | 44 | |
| 6.8 |
| Thermal Expansion, µm/m-K | 13 | |
| 8.9 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.5 | |
| 1.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.6 | |
| 2.0 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.5 | |
| 36 |
| Density, g/cm3 | 7.8 | |
| 4.4 |
| Embodied Carbon, kg CO2/kg material | 1.7 | |
| 38 |
| Embodied Energy, MJ/kg | 22 | |
| 610 |
| Embodied Water, L/kg | 53 | |
| 200 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 79 to 170 | |
| 100 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 590 to 3490 | |
| 3980 to 5880 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 35 |
| Strength to Weight: Axial, points | 24 to 45 | |
| 62 to 75 |
| Strength to Weight: Bending, points | 22 to 33 | |
| 50 to 56 |
| Thermal Diffusivity, mm2/s | 12 | |
| 2.7 |
| Thermal Shock Resistance, points | 20 to 38 | |
| 76 to 91 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 5.5 to 6.8 |
| Carbon (C), % | 0.38 to 0.43 | |
| 0 to 0.080 |
| Chromium (Cr), % | 0.7 to 0.9 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 95.1 to 96.3 | |
| 0 to 0.4 |
| Manganese (Mn), % | 0.6 to 0.8 | |
| 0 |
| Molybdenum (Mo), % | 0.2 to 0.3 | |
| 0 |
| Nickel (Ni), % | 1.7 to 2.0 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.050 |
| Oxygen (O), % | 0 | |
| 0 to 0.2 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 87.4 to 91 |
| Vanadium (V), % | 0 | |
| 3.5 to 4.5 |
| Yttrium (Y), % | 0 | |
| 0 to 0.0050 |
| Residuals, % | 0 | |
| 0 to 0.4 |