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Austenitic Grey Cast Iron vs. R31539 Cobalt

Austenitic grey cast iron belongs to the iron alloys classification, while R31539 cobalt belongs to the cobalt alloys. There are 18 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is austenitic grey cast iron and the bottom bar is R31539 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
220
Poisson's Ratio 0.29 to 0.3
0.29
Shear Modulus, GPa 69 to 72
86
Tensile Strength: Ultimate (UTS), MPa 150 to 230
1000 to 1340

Thermal Properties

Latent Heat of Fusion, J/g 280 to 350
320
Melting Completion (Liquidus), °C 1340 to 1400
1360
Melting Onset (Solidus), °C 1290 to 1350
1290
Specific Heat Capacity, J/kg-K 470 to 490
450
Thermal Expansion, µm/m-K 13 to 14
13

Otherwise Unclassified Properties

Density, g/cm3 7.7 to 8.1
8.4
Embodied Carbon, kg CO2/kg material 3.1 to 4.7
8.2
Embodied Energy, MJ/kg 43 to 65
110
Embodied Water, L/kg 93 to 120
530

Common Calculations

Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 23 to 25
24
Strength to Weight: Axial, points 5.3 to 8.2
33 to 44
Strength to Weight: Bending, points 7.9 to 11
27 to 32
Thermal Shock Resistance, points 4.5 to 6.5
24 to 32