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EN 1.7390 Steel vs. Type 3 Niobium

EN 1.7390 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 (13, in this case) are not shown.

For each property being compared, the top bar is EN 1.7390 steel and the bottom bar is Type 3 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
110
Elastic (Young's, Tensile) Modulus, GPa 190
100
Elongation at Break, % 16
23
Poisson's Ratio 0.29
0.4
Shear Modulus, GPa 74
38
Tensile Strength: Ultimate (UTS), MPa 710
220
Tensile Strength: Yield (Proof), MPa 480
140

Thermal Properties

Latent Heat of Fusion, J/g 260
310
Specific Heat Capacity, J/kg-K 470
270
Thermal Conductivity, W/m-K 40
42
Thermal Expansion, µm/m-K 13
7.3

Otherwise Unclassified Properties

Density, g/cm3 7.8
8.6
Embodied Water, L/kg 69
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
44
Resilience: Unit (Modulus of Resilience), kJ/m3 600
93
Stiffness to Weight: Axial, points 14
6.8
Stiffness to Weight: Bending, points 25
18
Strength to Weight: Axial, points 25
7.2
Strength to Weight: Bending, points 23
9.5
Thermal Diffusivity, mm2/s 11
18
Thermal Shock Resistance, points 20
21

Alloy Composition

Carbon (C), % 0 to 0.18
0 to 0.010
Chromium (Cr), % 4.0 to 6.0
0
Hafnium (Hf), % 0
0 to 0.020
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 91.9 to 95.3
0 to 0.0050
Manganese (Mn), % 0.3 to 0.8
0
Molybdenum (Mo), % 0.45 to 0.65
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 0.4
0 to 0.0050
Sulfur (S), % 0 to 0.015
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