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Automotive Malleable Cast Iron vs. EN 2.4964 Cobalt

Automotive malleable cast iron belongs to the iron alloys classification, while EN 2.4964 cobalt belongs to the cobalt alloys. There are 26 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is automotive malleable cast iron and the bottom bar is EN 2.4964 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
220
Elongation at Break, % 1.0 to 10
40
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 70
86
Tensile Strength: Ultimate (UTS), MPa 350 to 720
960
Tensile Strength: Yield (Proof), MPa 220 to 590
390

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Melting Completion (Liquidus), °C 1410
1630
Melting Onset (Solidus), °C 1370
1550
Specific Heat Capacity, J/kg-K 480
400
Thermal Conductivity, W/m-K 41
15
Thermal Expansion, µm/m-K 14
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
1.8

Otherwise Unclassified Properties

Density, g/cm3 7.6
9.6
Embodied Carbon, kg CO2/kg material 1.5
9.8
Embodied Energy, MJ/kg 20
140
Embodied Water, L/kg 45
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.8 to 30
310
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 950
340
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
21
Strength to Weight: Axial, points 13 to 26
28
Strength to Weight: Bending, points 14 to 24
23
Thermal Diffusivity, mm2/s 11
3.9
Thermal Shock Resistance, points 9.9 to 21
25

Alloy Composition

Carbon (C), % 2.2 to 2.9
0.050 to 0.15
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
46.4 to 58
Iron (Fe), % 93.6 to 96.7
0 to 3.0
Manganese (Mn), % 0.15 to 1.3
0 to 2.0
Nickel (Ni), % 0
9.0 to 11
Phosphorus (P), % 0.020 to 0.15
0 to 0.020
Silicon (Si), % 0.9 to 1.9
0 to 0.4
Sulfur (S), % 0.020 to 0.2
0 to 0.015
Tungsten (W), % 0
14 to 16