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R31539 Cobalt vs. Zamak 2

R31539 cobalt belongs to the cobalt alloys classification, while Zamak 2 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 R31539 cobalt and the bottom bar is Zamak 2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
87
Elongation at Break, % 13 to 22
6.0
Fatigue Strength, MPa 310 to 480
59
Poisson's Ratio 0.29
0.26
Shear Modulus, GPa 86
33
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
360
Tensile Strength: Yield (Proof), MPa 590 to 940
270

Thermal Properties

Latent Heat of Fusion, J/g 320
130
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
28

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
25
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
35

Otherwise Unclassified Properties

Density, g/cm3 8.4
6.5
Embodied Carbon, kg CO2/kg material 8.2
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 190
20
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 2000
420
Stiffness to Weight: Axial, points 15
7.5
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 33 to 44
15
Strength to Weight: Bending, points 27 to 32
17
Thermal Diffusivity, mm2/s 3.5
41
Thermal Shock Resistance, points 24 to 32
11

Alloy Composition

Aluminum (Al), % 0.3 to 1.0
3.5 to 4.3
Cadmium (Cd), % 0
0 to 0.0050
Carbon (C), % 0 to 0.14
0
Chromium (Cr), % 26 to 30
0
Cobalt (Co), % 57.7 to 68.7
0
Copper (Cu), % 0
2.5 to 3.3
Iron (Fe), % 0 to 0.75
0 to 0.1
Lanthanum (La), % 0.030 to 0.2
0
Lead (Pb), % 0
0 to 0.0050
Magnesium (Mg), % 0
0.020 to 0.060
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
92.2 to 94