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R05200 Tantalum vs. S17400 Stainless Steel

R05200 tantalum belongs to the otherwise unclassified metals classification, while S17400 stainless steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (16, 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 R05200 tantalum and the bottom bar is S17400 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 1.1 to 28
11 to 21
Poisson's Ratio 0.34
0.28
Shear Modulus, GPa 69
75
Tensile Strength: Ultimate (UTS), MPa 210 to 540
910 to 1390
Tensile Strength: Yield (Proof), MPa 140 to 390
580 to 1250

Thermal Properties

Latent Heat of Fusion, J/g 140
280
Specific Heat Capacity, J/kg-K 140
480
Thermal Conductivity, W/m-K 59
17
Thermal Expansion, µm/m-K 6.5
11

Otherwise Unclassified Properties

Density, g/cm3 17
7.8
Embodied Water, L/kg 650
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.5 to 53
140 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 50 to 420
880 to 4060
Stiffness to Weight: Axial, points 6.2
14
Stiffness to Weight: Bending, points 11
25
Strength to Weight: Axial, points 3.6 to 9.0
32 to 49
Strength to Weight: Bending, points 4.8 to 8.8
27 to 35
Thermal Diffusivity, mm2/s 25
4.5
Thermal Shock Resistance, points 13 to 32
30 to 46

Alloy Composition

Carbon (C), % 0 to 0.010
0 to 0.070
Chromium (Cr), % 0
15 to 17
Copper (Cu), % 0
3.0 to 5.0
Hydrogen (H), % 0 to 0.0015
0
Iron (Fe), % 0 to 0.010
70.4 to 78.9
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0 to 0.020
0
Nickel (Ni), % 0 to 0.010
3.0 to 5.0
Niobium (Nb), % 0 to 0.1
0.15 to 0.45
Nitrogen (N), % 0 to 0.010
0
Oxygen (O), % 0 to 0.015
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.0050
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 99.8 to 100
0
Titanium (Ti), % 0 to 0.010
0
Tungsten (W), % 0 to 0.050
0