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EN 1.7139 Steel vs. Type 3 Niobium

EN 1.7139 steel belongs to the iron alloys classification, while Type 3 niobium belongs to the otherwise unclassified metals. There are 17 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 EN 1.7139 steel and the bottom bar is Type 3 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
110
Elastic (Young's, Tensile) Modulus, GPa 190
100
Poisson's Ratio 0.29
0.4
Shear Modulus, GPa 73
38
Tensile Strength: Ultimate (UTS), MPa 480 to 1390
220

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Specific Heat Capacity, J/kg-K 470
270
Thermal Conductivity, W/m-K 44
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

Stiffness to Weight: Axial, points 13
6.8
Stiffness to Weight: Bending, points 24
18
Strength to Weight: Axial, points 17 to 49
7.2
Strength to Weight: Bending, points 17 to 35
9.5
Thermal Diffusivity, mm2/s 12
18
Thermal Shock Resistance, points 14 to 41
21

Alloy Composition

Carbon (C), % 0.14 to 0.19
0 to 0.010
Chromium (Cr), % 0.8 to 1.1
0
Copper (Cu), % 0 to 0.25
0
Hafnium (Hf), % 0
0 to 0.020
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 96.8 to 98
0 to 0.0050
Manganese (Mn), % 1.0 to 1.3
0
Molybdenum (Mo), % 0
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 0.3
0 to 0.0050
Sulfur (S), % 0.020 to 0.040
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