ASTM B817 Type II vs. Type 4 Niobium
ASTM B817 type II belongs to the titanium alloys classification, while Type 4 niobium belongs to the otherwise unclassified metals. There are 18 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.
For each property being compared, the top bar is ASTM B817 type II and the bottom bar is Type 4 niobium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 100 | |
| 110 |
| Elongation at Break, % | 3.0 to 13 | |
| 23 |
| Poisson's Ratio | 0.32 | |
| 0.4 |
| Shear Modulus, GPa | 40 | |
| 38 |
| Tensile Strength: Ultimate (UTS), MPa | 900 to 960 | |
| 220 |
| Tensile Strength: Yield (Proof), MPa | 780 to 900 | |
| 140 |
Thermal Properties
| Latent Heat of Fusion, J/g | 400 | |
| 310 |
| Specific Heat Capacity, J/kg-K | 550 | |
| 270 |
| Thermal Expansion, µm/m-K | 9.9 | |
| 7.3 |
Otherwise Unclassified Properties
| Density, g/cm3 | 4.6 | |
| 8.6 |
| Embodied Water, L/kg | 220 | |
| 160 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 26 to 120 | |
| 44 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2890 to 3890 | |
| 93 |
| Stiffness to Weight: Axial, points | 13 | |
| 6.8 |
| Stiffness to Weight: Bending, points | 34 | |
| 18 |
| Strength to Weight: Axial, points | 55 to 58 | |
| 7.2 |
| Strength to Weight: Bending, points | 45 to 47 | |
| 9.5 |
| Thermal Shock Resistance, points | 62 to 66 | |
| 21 |
Alloy Composition
| Aluminum (Al), % | 5.0 to 6.0 | |
| 0 |
| Carbon (C), % | 0 to 0.1 | |
| 0 to 0.010 |
| Chlorine (Cl), % | 0 to 0.2 | |
| 0 |
| Copper (Cu), % | 0.35 to 1.0 | |
| 0 |
| Hafnium (Hf), % | 0 | |
| 0 to 0.020 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 to 0.0015 |
| Iron (Fe), % | 0.35 to 1.0 | |
| 0 to 0.010 |
| Molybdenum (Mo), % | 0 | |
| 0 to 0.050 |
| Nickel (Ni), % | 0 | |
| 0 to 0.0050 |
| Niobium (Nb), % | 0 | |
| 98.1 to 99.2 |
| Nitrogen (N), % | 0 to 0.040 | |
| 0 to 0.010 |
| Oxygen (O), % | 0 to 0.3 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.1 | |
| 0 to 0.0050 |
| Sodium (Na), % | 0 to 0.2 | |
| 0 |
| Tantalum (Ta), % | 0 | |
| 0 to 0.5 |
| Tin (Sn), % | 1.5 to 2.5 | |
| 0 |
| Titanium (Ti), % | 82.1 to 87.8 | |
| 0 to 0.020 |
| Tungsten (W), % | 0 | |
| 0 to 0.050 |
| Vanadium (V), % | 5.0 to 6.0 | |
| 0 |
| Zirconium (Zr), % | 0 | |
| 0.8 to 1.2 |
| Residuals, % | 0 to 0.4 | |
| 0 |