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Nickel 684 vs. R05400 Tantalum

Nickel 684 belongs to the nickel alloys classification, while R05400 tantalum belongs to the otherwise unclassified metals. There are 18 material properties with values for both materials. Properties with values for just one material (12, 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 684 and the bottom bar is R05400 tantalum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 11
1.1 to 28
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 76
69
Tensile Strength: Ultimate (UTS), MPa 1190
210 to 540
Tensile Strength: Yield (Proof), MPa 800
140 to 390

Thermal Properties

Latent Heat of Fusion, J/g 320
140
Specific Heat Capacity, J/kg-K 470
140
Thermal Expansion, µm/m-K 13
6.5

Otherwise Unclassified Properties

Density, g/cm3 8.3
17
Embodied Water, L/kg 360
650

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
5.5 to 53
Resilience: Unit (Modulus of Resilience), kJ/m3 1610
50 to 420
Stiffness to Weight: Axial, points 13
6.2
Stiffness to Weight: Bending, points 23
11
Strength to Weight: Axial, points 40
3.6 to 9.0
Strength to Weight: Bending, points 30
4.8 to 8.8
Thermal Shock Resistance, points 34
13 to 32

Alloy Composition

Aluminum (Al), % 2.5 to 3.3
0
Boron (B), % 0.0030 to 0.010
0
Carbon (C), % 0 to 0.15
0 to 0.010
Chromium (Cr), % 15 to 20
0
Cobalt (Co), % 13 to 20
0
Copper (Cu), % 0 to 0.15
0
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 0 to 4.0
0 to 0.010
Manganese (Mn), % 0 to 0.75
0
Molybdenum (Mo), % 3.0 to 5.0
0 to 0.020
Nickel (Ni), % 42.7 to 64
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 0.015
0
Silicon (Si), % 0 to 0.75
0 to 0.0050
Sulfur (S), % 0 to 0.015
0
Tantalum (Ta), % 0
99.7 to 100
Titanium (Ti), % 2.5 to 3.3
0 to 0.010
Tungsten (W), % 0
0 to 0.050