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R30016 Cobalt vs. Zamak 2

R30016 cobalt belongs to the cobalt alloys classification, while Zamak 2 belongs to the zinc alloys. There are 28 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is R30016 cobalt and the bottom bar is Zamak 2.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 1600
640
Elastic (Young's, Tensile) Modulus, GPa 220
87
Elongation at Break, % 8.4
6.0
Fatigue Strength, MPa 290
59
Poisson's Ratio 0.28
0.26
Shear Modulus, GPa 85
33
Tensile Strength: Ultimate (UTS), MPa 1010
360
Tensile Strength: Yield (Proof), MPa 580
270

Thermal Properties

Latent Heat of Fusion, J/g 320
130
Melting Completion (Liquidus), °C 1360
390
Melting Onset (Solidus), °C 1270
380
Specific Heat Capacity, J/kg-K 450
410
Thermal Conductivity, W/m-K 15
110
Thermal Expansion, µm/m-K 14
28

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
25
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
35

Otherwise Unclassified Properties

Density, g/cm3 8.5
6.5
Embodied Carbon, kg CO2/kg material 7.7
3.0
Embodied Energy, MJ/kg 110
57
Embodied Water, L/kg 500
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 72
20
Resilience: Unit (Modulus of Resilience), kJ/m3 770
420
Stiffness to Weight: Axial, points 14
7.5
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 33
15
Strength to Weight: Bending, points 26
17
Thermal Diffusivity, mm2/s 3.9
41
Thermal Shock Resistance, points 24
11

Alloy Composition

Aluminum (Al), % 0
3.5 to 4.3
Cadmium (Cd), % 0
0 to 0.0050
Carbon (C), % 0.9 to 1.4
0
Chromium (Cr), % 28 to 32
0
Cobalt (Co), % 49.6 to 66.9
0
Copper (Cu), % 0
2.5 to 3.3
Iron (Fe), % 0 to 3.0
0 to 0.1
Lead (Pb), % 0
0 to 0.0050
Magnesium (Mg), % 0
0.020 to 0.060
Manganese (Mn), % 0.5 to 2.0
0
Molybdenum (Mo), % 0 to 1.5
0
Nickel (Ni), % 0 to 3.0
0 to 0.020
Silicon (Si), % 0.2 to 2.0
0 to 0.030
Tin (Sn), % 0
0 to 0.0030
Tungsten (W), % 3.5 to 5.5
0
Zinc (Zn), % 0
92.2 to 94