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R05400 Tantalum vs. EN 1.4749 Stainless Steel

R05400 tantalum belongs to the otherwise unclassified metals classification, while EN 1.4749 stainless steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (13, 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 EN 1.4749 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 1.1 to 28
16
Poisson's Ratio 0.34
0.27
Shear Modulus, GPa 69
80
Tensile Strength: Ultimate (UTS), MPa 210 to 540
600
Tensile Strength: Yield (Proof), MPa 140 to 390
320

Thermal Properties

Latent Heat of Fusion, J/g 140
300
Specific Heat Capacity, J/kg-K 140
490
Thermal Conductivity, W/m-K 59
17
Thermal Expansion, µm/m-K 6.5
9.6

Otherwise Unclassified Properties

Density, g/cm3 17
7.6
Embodied Water, L/kg 650
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.5 to 53
80
Resilience: Unit (Modulus of Resilience), kJ/m3 50 to 420
250
Stiffness to Weight: Axial, points 6.2
15
Stiffness to Weight: Bending, points 11
26
Strength to Weight: Axial, points 3.6 to 9.0
22
Strength to Weight: Bending, points 4.8 to 8.8
21
Thermal Diffusivity, mm2/s 25
4.6
Thermal Shock Resistance, points 13 to 32
22

Alloy Composition

Carbon (C), % 0 to 0.010
0.15 to 0.2
Chromium (Cr), % 0
26 to 29
Hydrogen (H), % 0 to 0.0015
0
Iron (Fe), % 0 to 0.010
68.5 to 73.7
Manganese (Mn), % 0
0 to 1.0
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
0.15 to 0.25
Oxygen (O), % 0 to 0.030
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.0050
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Tantalum (Ta), % 99.7 to 100
0
Titanium (Ti), % 0 to 0.010
0
Tungsten (W), % 0 to 0.050
0