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R05400 Tantalum vs. AWS ERTi-7

R05400 tantalum belongs to the otherwise unclassified metals classification, while AWS ERTi-7 belongs to the titanium alloys. There are 20 material properties with values for both materials. Properties with values for just one material (8, 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 R05400 tantalum and the bottom bar is AWS ERTi-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 1.1 to 28
20
Poisson's Ratio 0.34
0.32
Shear Modulus, GPa 69
40
Tensile Strength: Ultimate (UTS), MPa 210 to 540
340
Tensile Strength: Yield (Proof), MPa 140 to 390
280

Thermal Properties

Latent Heat of Fusion, J/g 140
420
Specific Heat Capacity, J/kg-K 140
540
Thermal Conductivity, W/m-K 59
21
Thermal Expansion, µm/m-K 6.5
8.7

Otherwise Unclassified Properties

Density, g/cm3 17
4.5
Embodied Water, L/kg 650
470

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.5 to 53
64
Resilience: Unit (Modulus of Resilience), kJ/m3 50 to 420
360
Stiffness to Weight: Axial, points 6.2
13
Stiffness to Weight: Bending, points 11
35
Strength to Weight: Axial, points 3.6 to 9.0
21
Strength to Weight: Bending, points 4.8 to 8.8
24
Thermal Diffusivity, mm2/s 25
8.8
Thermal Shock Resistance, points 13 to 32
26

Alloy Composition

Carbon (C), % 0 to 0.010
0 to 0.030
Hydrogen (H), % 0 to 0.0015
0 to 0.0080
Iron (Fe), % 0 to 0.010
0 to 0.12
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 0.015
Oxygen (O), % 0 to 0.030
0.080 to 0.16
Palladium (Pd), % 0
0.12 to 0.25
Silicon (Si), % 0 to 0.0050
0
Tantalum (Ta), % 99.7 to 100
0
Titanium (Ti), % 0 to 0.010
99.417 to 99.8
Tungsten (W), % 0 to 0.050
0