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R05200 Tantalum vs. R60704 Alloy

Both R05200 tantalum and R60704 alloy are otherwise unclassified metals. 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 R05200 tantalum and the bottom bar is R60704 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
97
Elongation at Break, % 1.1 to 28
16
Poisson's Ratio 0.34
0.34
Shear Modulus, GPa 69
36
Tensile Strength: Ultimate (UTS), MPa 210 to 540
470
Tensile Strength: Yield (Proof), MPa 140 to 390
270

Thermal Properties

Latent Heat of Fusion, J/g 140
240
Specific Heat Capacity, J/kg-K 140
270
Thermal Conductivity, W/m-K 59
22
Thermal Expansion, µm/m-K 6.5
6.0

Otherwise Unclassified Properties

Density, g/cm3 17
6.7
Embodied Water, L/kg 650
460

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.5 to 53
64
Resilience: Unit (Modulus of Resilience), kJ/m3 50 to 420
370
Stiffness to Weight: Axial, points 6.2
8.1
Stiffness to Weight: Bending, points 11
23
Strength to Weight: Axial, points 3.6 to 9.0
20
Strength to Weight: Bending, points 4.8 to 8.8
20
Thermal Diffusivity, mm2/s 25
12
Thermal Shock Resistance, points 13 to 32
58

Alloy Composition

Carbon (C), % 0 to 0.010
0 to 0.050
Chromium (Cr), % 0
0.2 to 0.4
Hafnium (Hf), % 0
0 to 4.5
Hydrogen (H), % 0 to 0.0015
0 to 0.0050
Iron (Fe), % 0 to 0.010
0.2 to 0.4
Molybdenum (Mo), % 0 to 0.020
0
Nickel (Ni), % 0 to 0.010
0
Niobium (Nb), % 0 to 0.1
0
Nitrogen (N), % 0 to 0.010
0 to 0.025
Oxygen (O), % 0 to 0.015
0 to 0.18
Silicon (Si), % 0 to 0.0050
0
Tantalum (Ta), % 99.8 to 100
0
Tin (Sn), % 0
1.0 to 2.0
Titanium (Ti), % 0 to 0.010
0
Tungsten (W), % 0 to 0.050
0
Zirconium (Zr), % 0
93 to 98.8