EN 1.7231 Steel vs. Type 3 Niobium
EN 1.7231 steel belongs to the iron alloys classification, while Type 3 niobium belongs to the otherwise unclassified metals. There are 21 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is EN 1.7231 steel and the bottom bar is Type 3 niobium.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 240 to 280 | |
110 |
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
100 |
Elongation at Break, % | 11 to 12 | |
23 |
Poisson's Ratio | 0.29 | |
0.4 |
Shear Modulus, GPa | 73 | |
38 |
Tensile Strength: Ultimate (UTS), MPa | 790 to 930 | |
220 |
Tensile Strength: Yield (Proof), MPa | 570 to 800 | |
140 |
Thermal Properties
Latent Heat of Fusion, J/g | 250 | |
310 |
Specific Heat Capacity, J/kg-K | 470 | |
270 |
Thermal Conductivity, W/m-K | 46 | |
42 |
Thermal Expansion, µm/m-K | 13 | |
7.3 |
Otherwise Unclassified Properties
Density, g/cm3 | 7.8 | |
8.6 |
Embodied Water, L/kg | 51 | |
160 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 87 to 100 | |
44 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 870 to 1700 | |
93 |
Stiffness to Weight: Axial, points | 13 | |
6.8 |
Stiffness to Weight: Bending, points | 24 | |
18 |
Strength to Weight: Axial, points | 28 to 33 | |
7.2 |
Strength to Weight: Bending, points | 24 to 27 | |
9.5 |
Thermal Diffusivity, mm2/s | 12 | |
18 |
Thermal Shock Resistance, points | 23 to 27 | |
21 |
Alloy Composition
Carbon (C), % | 0.38 to 0.45 | |
0 to 0.010 |
Chromium (Cr), % | 0.8 to 1.2 | |
0 |
Hafnium (Hf), % | 0 | |
0 to 0.020 |
Hydrogen (H), % | 0 | |
0 to 0.0015 |
Iron (Fe), % | 96.4 to 98.1 | |
0 to 0.0050 |
Manganese (Mn), % | 0.6 to 1.0 | |
0 |
Molybdenum (Mo), % | 0.15 to 0.3 | |
0 to 0.010 |
Nickel (Ni), % | 0 | |
0 to 0.0050 |
Niobium (Nb), % | 0 | |
98.6 to 99.2 |
Nitrogen (N), % | 0 | |
0 to 0.010 |
Oxygen (O), % | 0 | |
0 to 0.015 |
Phosphorus (P), % | 0 to 0.025 | |
0 |
Silicon (Si), % | 0 to 0.6 | |
0 to 0.0050 |
Sulfur (S), % | 0 to 0.030 | |
0 |
Tantalum (Ta), % | 0 | |
0 to 0.1 |
Titanium (Ti), % | 0 | |
0 to 0.020 |
Tungsten (W), % | 0 | |
0 to 0.030 |
Zirconium (Zr), % | 0 | |
0.8 to 1.2 |