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EN 1.7149 Steel vs. R05400 Tantalum

EN 1.7149 steel belongs to the iron alloys classification, while R05400 tantalum belongs to the otherwise unclassified metals. There are 16 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 EN 1.7149 steel and the bottom bar is R05400 tantalum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 73
69
Tensile Strength: Ultimate (UTS), MPa 500 to 1460
210 to 540

Thermal Properties

Latent Heat of Fusion, J/g 250
140
Specific Heat Capacity, J/kg-K 470
140
Thermal Conductivity, W/m-K 46
59
Thermal Expansion, µm/m-K 13
6.5

Otherwise Unclassified Properties

Density, g/cm3 7.8
17
Embodied Water, L/kg 52
650

Common Calculations

Stiffness to Weight: Axial, points 13
6.2
Stiffness to Weight: Bending, points 24
11
Strength to Weight: Axial, points 18 to 52
3.6 to 9.0
Strength to Weight: Bending, points 18 to 36
4.8 to 8.8
Thermal Diffusivity, mm2/s 12
25
Thermal Shock Resistance, points 15 to 42
13 to 32

Alloy Composition

Carbon (C), % 0.17 to 0.22
0 to 0.010
Chromium (Cr), % 1.0 to 1.3
0
Copper (Cu), % 0 to 0.25
0
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 96.5 to 97.7
0 to 0.010
Manganese (Mn), % 1.1 to 1.4
0
Molybdenum (Mo), % 0
0 to 0.020
Nickel (Ni), % 0
0 to 0.010
Niobium (Nb), % 0
0 to 0.1
Nitrogen (N), % 0
0 to 0.010
Oxygen (O), % 0
0 to 0.030
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
99.7 to 100
Titanium (Ti), % 0
0 to 0.010
Tungsten (W), % 0
0 to 0.050