R05400 Tantalum vs. EN 1.4415 Stainless Steel
R05400 tantalum belongs to the otherwise unclassified metals classification, while EN 1.4415 stainless steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.
For each property being compared, the top bar is R05400 tantalum and the bottom bar is EN 1.4415 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 1.1 to 28 | |
| 17 to 20 |
| Poisson's Ratio | 0.34 | |
| 0.28 |
| Shear Modulus, GPa | 69 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 210 to 540 | |
| 830 to 930 |
| Tensile Strength: Yield (Proof), MPa | 140 to 390 | |
| 730 to 840 |
Thermal Properties
| Latent Heat of Fusion, J/g | 140 | |
| 280 |
| Specific Heat Capacity, J/kg-K | 140 | |
| 470 |
| Thermal Conductivity, W/m-K | 59 | |
| 19 |
| Thermal Expansion, µm/m-K | 6.5 | |
| 9.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 17 | |
| 7.9 |
| Embodied Water, L/kg | 650 | |
| 120 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 5.5 to 53 | |
| 150 to 160 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 50 to 420 | |
| 1350 to 1790 |
| Stiffness to Weight: Axial, points | 6.2 | |
| 14 |
| Stiffness to Weight: Bending, points | 11 | |
| 25 |
| Strength to Weight: Axial, points | 3.6 to 9.0 | |
| 29 to 33 |
| Strength to Weight: Bending, points | 4.8 to 8.8 | |
| 25 to 27 |
| Thermal Diffusivity, mm2/s | 25 | |
| 5.1 |
| Thermal Shock Resistance, points | 13 to 32 | |
| 30 to 34 |
Alloy Composition
| Carbon (C), % | 0 to 0.010 | |
| 0 to 0.030 |
| Chromium (Cr), % | 0 | |
| 11.5 to 13.5 |
| Hydrogen (H), % | 0 to 0.0015 | |
| 0 |
| Iron (Fe), % | 0 to 0.010 | |
| 75.9 to 82.4 |
| Manganese (Mn), % | 0 | |
| 0 to 0.5 |
| Molybdenum (Mo), % | 0 to 0.020 | |
| 1.5 to 2.5 |
| Nickel (Ni), % | 0 to 0.010 | |
| 4.5 to 6.5 |
| Niobium (Nb), % | 0 to 0.1 | |
| 0 |
| Nitrogen (N), % | 0 to 0.010 | |
| 0 |
| Oxygen (O), % | 0 to 0.030 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.0050 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 | |
| 0 to 0.015 |
| Tantalum (Ta), % | 99.7 to 100 | |
| 0 |
| Titanium (Ti), % | 0 to 0.010 | |
| 0 to 0.010 |
| Tungsten (W), % | 0 to 0.050 | |
| 0 |
| Vanadium (V), % | 0 | |
| 0.1 to 0.5 |