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ASTM A27 Cast Steel vs. Type 4 Niobium

ASTM A27 cast steel belongs to the iron alloys classification, while Type 4 niobium belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is ASTM A27 cast steel and the bottom bar is Type 4 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 25 to 27
23
Poisson's Ratio 0.29
0.4
Shear Modulus, GPa 73
38
Tensile Strength: Ultimate (UTS), MPa 460 to 550
220
Tensile Strength: Yield (Proof), MPa 230 to 310
140

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Specific Heat Capacity, J/kg-K 470
270
Thermal Conductivity, W/m-K 52
42
Thermal Expansion, µm/m-K 12
7.3

Otherwise Unclassified Properties

Density, g/cm3 7.8
8.6
Embodied Water, L/kg 45 to 46
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 96 to 120
44
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 260
93
Stiffness to Weight: Axial, points 13
6.8
Stiffness to Weight: Bending, points 24
18
Strength to Weight: Axial, points 16 to 20
7.2
Strength to Weight: Bending, points 17 to 19
9.5
Thermal Diffusivity, mm2/s 14
18
Thermal Shock Resistance, points 15 to 18
21