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ASTM B817 Type II vs. R05200 Tantalum

ASTM B817 type II belongs to the titanium alloys classification, while R05200 tantalum belongs to the otherwise unclassified metals. There are 18 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 ASTM B817 type II and the bottom bar is R05200 tantalum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
190
Elongation at Break, % 3.0 to 13
1.1 to 28
Poisson's Ratio 0.32
0.34
Shear Modulus, GPa 40
69
Tensile Strength: Ultimate (UTS), MPa 900 to 960
210 to 540
Tensile Strength: Yield (Proof), MPa 780 to 900
140 to 390

Thermal Properties

Latent Heat of Fusion, J/g 400
140
Specific Heat Capacity, J/kg-K 550
140
Thermal Expansion, µm/m-K 9.9
6.5

Otherwise Unclassified Properties

Density, g/cm3 4.6
17
Embodied Water, L/kg 220
650

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 26 to 120
5.5 to 53
Resilience: Unit (Modulus of Resilience), kJ/m3 2890 to 3890
50 to 420
Stiffness to Weight: Axial, points 13
6.2
Stiffness to Weight: Bending, points 34
11
Strength to Weight: Axial, points 55 to 58
3.6 to 9.0
Strength to Weight: Bending, points 45 to 47
4.8 to 8.8
Thermal Shock Resistance, points 62 to 66
13 to 32

Alloy Composition


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Aluminum (Al), % 5.0 to 6.0
0
Carbon (C), % 0 to 0.1
0 to 0.010
Chlorine (Cl), % 0 to 0.2
0
Copper (Cu), % 0.35 to 1.0
0
Hydrogen (H), % 0 to 0.015
0 to 0.0015
Iron (Fe), % 0.35 to 1.0
0 to 0.010
Molybdenum (Mo), % 0
0 to 0.020
Nickel (Ni), % 0
0 to 0.010
Niobium (Nb), % 0
0 to 0.1
Nitrogen (N), % 0 to 0.040
0 to 0.010
Oxygen (O), % 0 to 0.3
0 to 0.015
Silicon (Si), % 0 to 0.1
0 to 0.0050
Sodium (Na), % 0 to 0.2
0
Tantalum (Ta), % 0
99.8 to 100
Tin (Sn), % 1.5 to 2.5
0
Titanium (Ti), % 82.1 to 87.8
0 to 0.010
Tungsten (W), % 0
0 to 0.050
Vanadium (V), % 5.0 to 6.0
0
Residuals, % 0 to 0.4
0