Grade 21 Titanium vs. 70Ag-30Ni Alloy
Grade 21 titanium belongs to the titanium alloys classification, while 70Ag-30Ni alloy belongs to the otherwise unclassified metals. There are 15 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.
For each property being compared, the top bar is grade 21 titanium and the bottom bar is 70Ag-30Ni alloy.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 140 | |
| 100 |
| Poisson's Ratio | 0.32 | |
| 0.35 |
| Shear Modulus, GPa | 51 | |
| 39 |
| Tensile Strength: Ultimate (UTS), MPa | 890 to 1340 | |
| 320 to 530 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 170 |
| Melting Completion (Liquidus), °C | 1740 | |
| 960 |
| Melting Onset (Solidus), °C | 1690 | |
| 960 |
| Specific Heat Capacity, J/kg-K | 500 | |
| 300 |
| Thermal Expansion, µm/m-K | 7.1 | |
| 17 |
Otherwise Unclassified Properties
| Density, g/cm3 | 5.4 | |
| 10 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 5.8 |
| Stiffness to Weight: Bending, points | 32 | |
| 16 |
| Strength to Weight: Axial, points | 46 to 69 | |
| 8.8 to 15 |
| Strength to Weight: Bending, points | 38 to 50 | |
| 10 to 15 |
| Thermal Shock Resistance, points | 66 to 100 | |
| 13 to 21 |
Alloy Composition
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| Aluminum (Al), % | 2.5 to 3.5 | |
| 0 |
| Carbon (C), % | 0 to 0.050 | |
| 0 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.4 | |
| 0 |
| Molybdenum (Mo), % | 14 to 16 | |
| 0 |
| Nickel (Ni), % | 0 | |
| 28.8 to 31 |
| Niobium (Nb), % | 2.2 to 3.2 | |
| 0 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 |
| Oxygen (O), % | 0 to 0.17 | |
| 0 |
| Silicon (Si), % | 0.15 to 0.25 | |
| 0 |
| Silver (Ag), % | 0 | |
| 69 to 71 |
| Titanium (Ti), % | 76 to 81.2 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 to 0.2 |