Grade 7 Titanium vs. Grade VDSiCr Steel
Grade 7 titanium belongs to the titanium alloys classification, while grade VDSiCr steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is grade 7 titanium and the bottom bar is grade VDSiCr steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 150 | |
| 590 |
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 190 |
| Poisson's Ratio | 0.32 | |
| 0.29 |
| Reduction in Area, % | 34 | |
| 48 |
| Shear Modulus, GPa | 38 | |
| 80 |
| Tensile Strength: Ultimate (UTS), MPa | 420 | |
| 1950 |
Thermal Properties
| Latent Heat of Fusion, J/g | 420 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 320 | |
| 410 |
| Melting Completion (Liquidus), °C | 1660 | |
| 1440 |
| Melting Onset (Solidus), °C | 1610 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 540 | |
| 480 |
| Thermal Conductivity, W/m-K | 22 | |
| 46 |
| Thermal Expansion, µm/m-K | 9.2 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 3.6 | |
| 7.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 7.2 | |
| 8.5 |
Otherwise Unclassified Properties
| Density, g/cm3 | 4.5 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 47 | |
| 1.5 |
| Embodied Energy, MJ/kg | 800 | |
| 20 |
| Embodied Water, L/kg | 470 | |
| 48 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 35 | |
| 25 |
| Strength to Weight: Axial, points | 26 | |
| 70 |
| Strength to Weight: Bending, points | 28 | |
| 45 |
| Thermal Diffusivity, mm2/s | 8.9 | |
| 12 |
| Thermal Shock Resistance, points | 31 | |
| 58 |
Alloy Composition
| Carbon (C), % | 0 to 0.080 | |
| 0.5 to 0.6 |
| Chromium (Cr), % | 0 | |
| 0.5 to 0.8 |
| Copper (Cu), % | 0 | |
| 0 to 0.060 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.3 | |
| 96.6 to 97.8 |
| Manganese (Mn), % | 0 | |
| 0.5 to 0.9 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 |
| Oxygen (O), % | 0 to 0.25 | |
| 0 |
| Palladium (Pd), % | 0.12 to 0.25 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 | |
| 1.2 to 1.6 |
| Sulfur (S), % | 0 | |
| 0 to 0.020 |
| Titanium (Ti), % | 98.7 to 99.88 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 |