Type 1 Niobium vs. AISI 321 Stainless Steel
Type 1 niobium belongs to the otherwise unclassified metals classification, while AISI 321 stainless steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.
For each property being compared, the top bar is Type 1 niobium and the bottom bar is AISI 321 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 79 | |
| 170 to 210 |
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 200 |
| Elongation at Break, % | 29 | |
| 34 to 50 |
| Poisson's Ratio | 0.4 | |
| 0.28 |
| Shear Modulus, GPa | 38 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 140 | |
| 590 to 690 |
| Tensile Strength: Yield (Proof), MPa | 82 | |
| 220 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 290 |
| Specific Heat Capacity, J/kg-K | 270 | |
| 480 |
| Thermal Conductivity, W/m-K | 52 | |
| 16 |
| Thermal Expansion, µm/m-K | 7.3 | |
| 17 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.6 | |
| 7.8 |
| Embodied Water, L/kg | 160 | |
| 140 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 35 | |
| 190 to 230 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 32 | |
| 130 to 310 |
| Stiffness to Weight: Axial, points | 6.8 | |
| 14 |
| Stiffness to Weight: Bending, points | 18 | |
| 25 |
| Strength to Weight: Axial, points | 4.6 | |
| 21 to 25 |
| Strength to Weight: Bending, points | 7.1 | |
| 20 to 22 |
| Thermal Diffusivity, mm2/s | 23 | |
| 4.1 |
| Thermal Shock Resistance, points | 13 | |
| 13 to 15 |
Alloy Composition
| Carbon (C), % | 0 to 0.010 | |
| 0 to 0.080 |
| Chromium (Cr), % | 0 | |
| 17 to 19 |
| Hafnium (Hf), % | 0 to 0.020 | |
| 0 |
| Hydrogen (H), % | 0 to 0.0015 | |
| 0 |
| Iron (Fe), % | 0 to 0.0050 | |
| 65.3 to 74 |
| Manganese (Mn), % | 0 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 0 to 0.010 | |
| 0 |
| Nickel (Ni), % | 0 to 0.0050 | |
| 9.0 to 12 |
| Niobium (Nb), % | 99.7 to 100 | |
| 0 |
| Nitrogen (N), % | 0 to 0.010 | |
| 0 to 0.1 |
| Oxygen (O), % | 0 to 0.015 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 to 0.0050 | |
| 0 to 0.75 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |
| Tantalum (Ta), % | 0 to 0.1 | |
| 0 |
| Titanium (Ti), % | 0 to 0.020 | |
| 0 to 0.7 |
| Tungsten (W), % | 0 to 0.030 | |
| 0 |
| Zirconium (Zr), % | 0 to 0.020 | |
| 0 |