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Nickel 718 vs. R05400 Tantalum

Nickel 718 belongs to the nickel alloys classification, while R05400 tantalum belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (14, 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 nickel 718 and the bottom bar is R05400 tantalum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12 to 50
1.1 to 28
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 75
69
Tensile Strength: Ultimate (UTS), MPa 930 to 1530
210 to 540
Tensile Strength: Yield (Proof), MPa 510 to 1330
140 to 390

Thermal Properties

Latent Heat of Fusion, J/g 310
140
Specific Heat Capacity, J/kg-K 450
140
Thermal Conductivity, W/m-K 11
59
Thermal Expansion, µm/m-K 13
6.5

Otherwise Unclassified Properties

Density, g/cm3 8.3
17
Embodied Water, L/kg 250
650

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 390
5.5 to 53
Resilience: Unit (Modulus of Resilience), kJ/m3 660 to 4560
50 to 420
Stiffness to Weight: Axial, points 13
6.2
Stiffness to Weight: Bending, points 23
11
Strength to Weight: Axial, points 31 to 51
3.6 to 9.0
Strength to Weight: Bending, points 25 to 35
4.8 to 8.8
Thermal Diffusivity, mm2/s 3.0
25
Thermal Shock Resistance, points 27 to 44
13 to 32

Alloy Composition

Aluminum (Al), % 0.2 to 0.8
0
Boron (B), % 0 to 0.0060
0
Carbon (C), % 0 to 0.080
0 to 0.010
Chromium (Cr), % 17 to 21
0
Cobalt (Co), % 0 to 1.0
0
Copper (Cu), % 0 to 0.3
0
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 11.1 to 24.6
0 to 0.010
Manganese (Mn), % 0 to 0.35
0
Molybdenum (Mo), % 2.8 to 3.3
0 to 0.020
Nickel (Ni), % 50 to 55
0 to 0.010
Niobium (Nb), % 4.8 to 5.5
0 to 0.1
Nitrogen (N), % 0
0 to 0.010
Oxygen (O), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0 to 0.35
0 to 0.0050
Sulfur (S), % 0 to 0.015
0
Tantalum (Ta), % 0
99.7 to 100
Titanium (Ti), % 0.65 to 1.2
0 to 0.010
Tungsten (W), % 0
0 to 0.050