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R30605 Cobalt vs. Automotive Grey Cast Iron

R30605 cobalt belongs to the cobalt alloys classification, while automotive grey cast iron belongs to the iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is R30605 cobalt and the bottom bar is automotive grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
180
Elongation at Break, % 34
9.6 to 14
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
69 to 70
Tensile Strength: Ultimate (UTS), MPa 1130 to 1900
140 to 290
Tensile Strength: Yield (Proof), MPa 470 to 1600
94 to 200

Thermal Properties

Latent Heat of Fusion, J/g 290
260 to 280
Melting Completion (Liquidus), °C 1410
1380 to 1390
Melting Onset (Solidus), °C 1330
1340 to 1350
Specific Heat Capacity, J/kg-K 410
490
Thermal Conductivity, W/m-K 9.6
41 to 43
Thermal Expansion, µm/m-K 12
12 to 14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.4 to 7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
8.8 to 9.1

Otherwise Unclassified Properties

Density, g/cm3 9.6
7.5 to 7.6
Embodied Carbon, kg CO2/kg material 9.8
1.5 to 1.7
Embodied Energy, MJ/kg 140
21 to 24
Embodied Water, L/kg 450
44 to 51

Common Calculations

Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 33 to 55
5.2 to 11
Strength to Weight: Bending, points 25 to 36
8.0 to 13
Thermal Diffusivity, mm2/s 2.5
11 to 12
Thermal Shock Resistance, points 31 to 52
4.2 to 8.6