ASTM B631 Class C vs. Type 4 Niobium
Both ASTM B631 class C and Type 4 niobium are otherwise unclassified metals. There are 11 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 ASTM B631 class C and the bottom bar is Type 4 niobium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 180 to 190 | |
| 110 |
| Poisson's Ratio | 0.32 | |
| 0.4 |
| Shear Modulus, GPa | 66 to 71 | |
| 38 |
Thermal Properties
| Latent Heat of Fusion, J/g | 140 to 150 | |
| 310 |
| Specific Heat Capacity, J/kg-K | 180 | |
| 270 |
| Thermal Conductivity, W/m-K | 450 to 490 | |
| 42 |
| Thermal Expansion, µm/m-K | 14 | |
| 7.3 |
Otherwise Unclassified Properties
| Density, g/cm3 | 13 to 14 | |
| 8.6 |
Common Calculations
| Stiffness to Weight: Axial, points | 7.4 to 7.6 | |
| 6.8 |
| Stiffness to Weight: Bending, points | 14 | |
| 18 |
| Thermal Diffusivity, mm2/s | 180 to 200 | |
| 18 |