AISI 440C Stainless Steel vs. Type 4 Niobium
AISI 440C stainless steel belongs to the iron alloys classification, while Type 4 niobium belongs to the otherwise unclassified metals. There are 19 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.
For each property being compared, the top bar is AISI 440C stainless steel and the bottom bar is Type 4 niobium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 110 |
| Elongation at Break, % | 2.0 to 14 | |
| 23 |
| Poisson's Ratio | 0.28 | |
| 0.4 |
| Shear Modulus, GPa | 76 | |
| 38 |
| Tensile Strength: Ultimate (UTS), MPa | 710 to 1970 | |
| 220 |
| Tensile Strength: Yield (Proof), MPa | 450 to 1900 | |
| 140 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 310 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 270 |
| Thermal Conductivity, W/m-K | 22 | |
| 42 |
| Thermal Expansion, µm/m-K | 10 | |
| 7.3 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.7 | |
| 8.6 |
| Embodied Water, L/kg | 120 | |
| 160 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 39 to 88 | |
| 44 |
| Stiffness to Weight: Axial, points | 14 | |
| 6.8 |
| Stiffness to Weight: Bending, points | 25 | |
| 18 |
| Strength to Weight: Axial, points | 26 to 71 | |
| 7.2 |
| Strength to Weight: Bending, points | 23 to 46 | |
| 9.5 |
| Thermal Diffusivity, mm2/s | 6.0 | |
| 18 |
| Thermal Shock Resistance, points | 26 to 71 | |
| 21 |
Alloy Composition
| Carbon (C), % | 1.0 to 1.2 | |
| 0 to 0.010 |
| Chromium (Cr), % | 16 to 18 | |
| 0 |
| Hafnium (Hf), % | 0 | |
| 0 to 0.020 |
| Hydrogen (H), % | 0 | |
| 0 to 0.0015 |
| Iron (Fe), % | 78 to 83.1 | |
| 0 to 0.010 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 |
| Molybdenum (Mo), % | 0 to 0.75 | |
| 0 to 0.050 |
| Nickel (Ni), % | 0 | |
| 0 to 0.0050 |
| Niobium (Nb), % | 0 | |
| 98.1 to 99.2 |
| Nitrogen (N), % | 0 | |
| 0 to 0.010 |
| Oxygen (O), % | 0 | |
| 0 to 0.025 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.0050 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 |
| Tantalum (Ta), % | 0 | |
| 0 to 0.5 |
| Titanium (Ti), % | 0 | |
| 0 to 0.020 |
| Tungsten (W), % | 0 | |
| 0 to 0.050 |
| Zirconium (Zr), % | 0 | |
| 0.8 to 1.2 |