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Zamak 5 vs. R30605 Cobalt

Zamak 5 belongs to the zinc alloys classification, while R30605 cobalt belongs to the cobalt alloys. There are 25 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 Zamak 5 and the bottom bar is R30605 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 87
210
Elongation at Break, % 6.3
34
Fatigue Strength, MPa 56
260 to 590
Poisson's Ratio 0.25
0.29
Shear Modulus, GPa 33
81
Tensile Strength: Ultimate (UTS), MPa 330
1130 to 1900
Tensile Strength: Yield (Proof), MPa 240
470 to 1600

Thermal Properties

Latent Heat of Fusion, J/g 120
290
Melting Completion (Liquidus), °C 390
1410
Melting Onset (Solidus), °C 380
1330
Specific Heat Capacity, J/kg-K 410
410
Thermal Conductivity, W/m-K 110
9.6
Thermal Expansion, µm/m-K 27
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 37
1.8

Otherwise Unclassified Properties

Density, g/cm3 6.4
9.6
Embodied Carbon, kg CO2/kg material 3.0
9.8
Embodied Energy, MJ/kg 57
140
Embodied Water, L/kg 380
450

Common Calculations

Stiffness to Weight: Axial, points 7.5
12
Stiffness to Weight: Bending, points 23
21
Strength to Weight: Axial, points 14
33 to 55
Strength to Weight: Bending, points 16
25 to 36
Thermal Diffusivity, mm2/s 42
2.5
Thermal Shock Resistance, points 9.9
31 to 52

Alloy Composition

Aluminum (Al), % 3.5 to 4.3
0
Cadmium (Cd), % 0 to 0.0050
0
Carbon (C), % 0
0.050 to 0.15
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
46.4 to 57
Copper (Cu), % 0.7 to 1.3
0
Iron (Fe), % 0 to 0.1
0 to 3.0
Lead (Pb), % 0 to 0.0050
0
Magnesium (Mg), % 0.025 to 0.080
0
Manganese (Mn), % 0
1.0 to 2.0
Nickel (Ni), % 0 to 0.020
9.0 to 11
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.030
0 to 0.4
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 0 to 0.0030
0
Tungsten (W), % 0
14 to 16
Zinc (Zn), % 94.3 to 95.7
0