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Austenitic Nodular Cast Iron vs. R31537 Cobalt

Austenitic nodular cast iron belongs to the iron alloys classification, while R31537 cobalt belongs to the cobalt alloys. There are 22 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is austenitic nodular cast iron and the bottom bar is R31537 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180 to 190
220
Elongation at Break, % 6.8 to 34
14 to 23
Poisson's Ratio 0.29 to 0.3
0.29
Shear Modulus, GPa 70 to 72
87
Tensile Strength: Ultimate (UTS), MPa 430 to 500
1000 to 1340
Tensile Strength: Yield (Proof), MPa 190 to 240
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 280 to 350
320
Melting Completion (Liquidus), °C 1340 to 1400
1360
Melting Onset (Solidus), °C 1300 to 1360
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 8.0
8.4
Embodied Carbon, kg CO2/kg material 3.5 to 4.9
8.1
Embodied Energy, MJ/kg 48 to 68
110
Embodied Water, L/kg 91 to 120
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 140
140 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 98 to 160
780 to 1990
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24 to 25
24
Strength to Weight: Axial, points 15 to 18
33 to 44
Strength to Weight: Bending, points 16 to 18
26 to 32
Thermal Shock Resistance, points 12 to 15
24 to 32