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ASTM A27 Cast Steel vs. R05400 Tantalum

ASTM A27 cast steel belongs to the iron alloys classification, while R05400 tantalum belongs to the otherwise unclassified metals. There are 20 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 A27 cast steel and the bottom bar is R05400 tantalum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 25 to 27
1.1 to 28
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 73
69
Tensile Strength: Ultimate (UTS), MPa 460 to 550
210 to 540
Tensile Strength: Yield (Proof), MPa 230 to 310
140 to 390

Thermal Properties

Latent Heat of Fusion, J/g 250
140
Specific Heat Capacity, J/kg-K 470
140
Thermal Conductivity, W/m-K 52
59
Thermal Expansion, µm/m-K 12
6.5

Otherwise Unclassified Properties

Density, g/cm3 7.8
17
Embodied Water, L/kg 45 to 46
650

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 96 to 120
5.5 to 53
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 260
50 to 420
Stiffness to Weight: Axial, points 13
6.2
Stiffness to Weight: Bending, points 24
11
Strength to Weight: Axial, points 16 to 20
3.6 to 9.0
Strength to Weight: Bending, points 17 to 19
4.8 to 8.8
Thermal Diffusivity, mm2/s 14
25
Thermal Shock Resistance, points 15 to 18
13 to 32