Type 4 Niobium vs. EN 1.4729 Stainless Steel
Type 4 niobium belongs to the otherwise unclassified metals classification, while EN 1.4729 stainless steel belongs to the iron alloys. There are 14 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.
For each property being compared, the top bar is Type 4 niobium and the bottom bar is EN 1.4729 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 120 | |
| 260 |
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 190 |
| Elongation at Break, % | 23 | |
| 15 |
| Poisson's Ratio | 0.4 | |
| 0.28 |
| Shear Modulus, GPa | 38 | |
| 75 |
Thermal Properties
| Latent Heat of Fusion, J/g | 310 | |
| 300 |
| Specific Heat Capacity, J/kg-K | 270 | |
| 490 |
| Thermal Conductivity, W/m-K | 42 | |
| 24 |
| Thermal Expansion, µm/m-K | 7.3 | |
| 10 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.6 | |
| 7.6 |
| Embodied Water, L/kg | 160 | |
| 100 |
Common Calculations
| Stiffness to Weight: Axial, points | 6.8 | |
| 14 |
| Stiffness to Weight: Bending, points | 18 | |
| 25 |
| Thermal Diffusivity, mm2/s | 18 | |
| 6.5 |
Alloy Composition
| Carbon (C), % | 0 to 0.010 | |
| 0.3 to 0.5 |
| Chromium (Cr), % | 0 | |
| 12 to 14 |
| Hafnium (Hf), % | 0 to 0.020 | |
| 0 |
| Hydrogen (H), % | 0 to 0.0015 | |
| 0 |
| Iron (Fe), % | 0 to 0.010 | |
| 80.4 to 86.7 |
| Manganese (Mn), % | 0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0 to 0.050 | |
| 0 to 0.5 |
| Nickel (Ni), % | 0 to 0.0050 | |
| 0 to 1.0 |
| Niobium (Nb), % | 98.1 to 99.2 | |
| 0 |
| Nitrogen (N), % | 0 to 0.010 | |
| 0 |
| Oxygen (O), % | 0 to 0.025 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.0050 | |
| 1.0 to 2.5 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |
| Tantalum (Ta), % | 0 to 0.5 | |
| 0 |
| Titanium (Ti), % | 0 to 0.020 | |
| 0 |
| Tungsten (W), % | 0 to 0.050 | |
| 0 |
| Zirconium (Zr), % | 0.8 to 1.2 | |
| 0 |