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Nickel 685 vs. R05400 Tantalum

Nickel 685 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 (10, 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 685 and the bottom bar is R05400 tantalum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
1.1 to 28
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 77
69
Tensile Strength: Ultimate (UTS), MPa 1250
210 to 540
Tensile Strength: Yield (Proof), MPa 850
140 to 390

Thermal Properties

Latent Heat of Fusion, J/g 320
140
Specific Heat Capacity, J/kg-K 460
140
Thermal Conductivity, W/m-K 13
59
Thermal Expansion, µm/m-K 12
6.5

Otherwise Unclassified Properties

Density, g/cm3 8.4
17
Embodied Water, L/kg 340
650

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
5.5 to 53
Resilience: Unit (Modulus of Resilience), kJ/m3 1820
50 to 420
Stiffness to Weight: Axial, points 13
6.2
Stiffness to Weight: Bending, points 23
11
Strength to Weight: Axial, points 42
3.6 to 9.0
Strength to Weight: Bending, points 31
4.8 to 8.8
Thermal Diffusivity, mm2/s 3.3
25
Thermal Shock Resistance, points 37
13 to 32

Alloy Composition

Aluminum (Al), % 1.2 to 1.6
0
Boron (B), % 0.0030 to 0.010
0
Carbon (C), % 0.030 to 0.1
0 to 0.010
Chromium (Cr), % 18 to 21
0
Cobalt (Co), % 12 to 15
0
Copper (Cu), % 0 to 0.5
0
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 0 to 2.0
0 to 0.010
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 3.5 to 5.0
0 to 0.020
Nickel (Ni), % 49.6 to 62.5
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 0.030
0
Silicon (Si), % 0 to 0.75
0 to 0.0050
Sulfur (S), % 0 to 0.030
0
Tantalum (Ta), % 0
99.7 to 100
Titanium (Ti), % 2.8 to 3.3
0 to 0.010
Tungsten (W), % 0
0 to 0.050
Zinc (Zn), % 0.020 to 0.12
0