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R31538 Cobalt vs. Zamak 5

R31538 cobalt belongs to the cobalt alloys classification, while Zamak 5 belongs to the zinc alloys. There are 27 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is R31538 cobalt and the bottom bar is Zamak 5.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
87
Elongation at Break, % 13 to 23
6.3
Fatigue Strength, MPa 310 to 480
56
Poisson's Ratio 0.29
0.25
Shear Modulus, GPa 86
33
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
330
Tensile Strength: Yield (Proof), MPa 580 to 930
240

Thermal Properties

Latent Heat of Fusion, J/g 320
120
Melting Completion (Liquidus), °C 1360
390
Melting Onset (Solidus), °C 1290
380
Specific Heat Capacity, J/kg-K 450
410
Thermal Conductivity, W/m-K 13
110
Thermal Expansion, µm/m-K 13
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
26
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
37

Otherwise Unclassified Properties

Density, g/cm3 8.4
6.4
Embodied Carbon, kg CO2/kg material 8.1
3.0
Embodied Energy, MJ/kg 110
57
Embodied Water, L/kg 530
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
19
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
330
Stiffness to Weight: Axial, points 15
7.5
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 34 to 45
14
Strength to Weight: Bending, points 27 to 32
16
Thermal Diffusivity, mm2/s 3.5
42
Thermal Shock Resistance, points 25 to 33
9.9

Alloy Composition

Aluminum (Al), % 0
3.5 to 4.3
Cadmium (Cd), % 0
0 to 0.0050
Carbon (C), % 0.15 to 0.35
0
Chromium (Cr), % 26 to 30
0
Cobalt (Co), % 58.7 to 68.9
0
Copper (Cu), % 0
0.7 to 1.3
Iron (Fe), % 0 to 0.75
0 to 0.1
Lead (Pb), % 0
0 to 0.0050
Magnesium (Mg), % 0
0.025 to 0.080
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
0 to 0.020
Nitrogen (N), % 0 to 0.25
0
Silicon (Si), % 0 to 1.0
0 to 0.030
Tin (Sn), % 0
0 to 0.0030
Zinc (Zn), % 0
94.3 to 95.7