Type 3 Niobium vs. SAE-AISI H25 Steel
Type 3 niobium belongs to the otherwise unclassified metals classification, while SAE-AISI H25 steel belongs to the iron alloys. There are 16 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 Type 3 niobium and the bottom bar is SAE-AISI H25 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 100 | |
| 200 |
| Poisson's Ratio | 0.4 | |
| 0.29 |
| Shear Modulus, GPa | 38 | |
| 79 |
| Tensile Strength: Ultimate (UTS), MPa | 220 | |
| 710 to 1620 |
Thermal Properties
| Latent Heat of Fusion, J/g | 310 | |
| 250 |
| Specific Heat Capacity, J/kg-K | 270 | |
| 420 |
| Thermal Conductivity, W/m-K | 42 | |
| 26 |
| Thermal Expansion, µm/m-K | 7.3 | |
| 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.6 | |
| 9.1 |
| Embodied Water, L/kg | 160 | |
| 83 |
Common Calculations
| Stiffness to Weight: Axial, points | 6.8 | |
| 12 |
| Stiffness to Weight: Bending, points | 18 | |
| 22 |
| Strength to Weight: Axial, points | 7.2 | |
| 22 to 50 |
| Strength to Weight: Bending, points | 9.5 | |
| 20 to 34 |
| Thermal Diffusivity, mm2/s | 18 | |
| 6.7 |
| Thermal Shock Resistance, points | 21 | |
| 22 to 49 |
Alloy Composition
| Carbon (C), % | 0 to 0.010 | |
| 0.22 to 0.32 |
| Chromium (Cr), % | 0 | |
| 3.8 to 4.5 |
| Copper (Cu), % | 0 | |
| 0 to 0.25 |
| Hafnium (Hf), % | 0 to 0.020 | |
| 0 |
| Hydrogen (H), % | 0 to 0.0015 | |
| 0 |
| Iron (Fe), % | 0 to 0.0050 | |
| 77.2 to 81.3 |
| Manganese (Mn), % | 0 | |
| 0.15 to 0.4 |
| Molybdenum (Mo), % | 0 to 0.010 | |
| 0 |
| Nickel (Ni), % | 0 to 0.0050 | |
| 0 to 0.3 |
| Niobium (Nb), % | 98.6 to 99.2 | |
| 0 |
| Nitrogen (N), % | 0 to 0.010 | |
| 0 |
| Oxygen (O), % | 0 to 0.015 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.030 |
| Silicon (Si), % | 0 to 0.0050 | |
| 0.15 to 0.4 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |
| Tantalum (Ta), % | 0 to 0.1 | |
| 0 |
| Titanium (Ti), % | 0 to 0.020 | |
| 0 |
| Tungsten (W), % | 0 to 0.030 | |
| 14 to 16 |
| Vanadium (V), % | 0 | |
| 0.4 to 0.6 |
| Zirconium (Zr), % | 0.8 to 1.2 | |
| 0 |