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Zamak 5 vs. G-CoCr28 Cobalt

Zamak 5 belongs to the zinc alloys classification, while G-CoCr28 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is Zamak 5 and the bottom bar is G-CoCr28 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 87
210
Elongation at Break, % 6.3
6.7
Fatigue Strength, MPa 56
130
Poisson's Ratio 0.25
0.28
Shear Modulus, GPa 33
83
Tensile Strength: Ultimate (UTS), MPa 330
560
Tensile Strength: Yield (Proof), MPa 240
260

Thermal Properties

Latent Heat of Fusion, J/g 120
320
Maximum Temperature: Mechanical, °C 95
1200
Melting Completion (Liquidus), °C 390
1330
Melting Onset (Solidus), °C 380
1270
Specific Heat Capacity, J/kg-K 410
470
Thermal Conductivity, W/m-K 110
8.5
Thermal Expansion, µm/m-K 27
14

Otherwise Unclassified Properties

Base Metal Price, % relative 12
100
Density, g/cm3 6.4
8.1
Embodied Carbon, kg CO2/kg material 3.0
6.2
Embodied Energy, MJ/kg 57
84
Embodied Water, L/kg 380
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19
31
Resilience: Unit (Modulus of Resilience), kJ/m3 330
160
Stiffness to Weight: Axial, points 7.5
15
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 14
19
Strength to Weight: Bending, points 16
19
Thermal Diffusivity, mm2/s 42
2.2
Thermal Shock Resistance, points 9.9
14

Alloy Composition

Aluminum (Al), % 3.5 to 4.3
0
Cadmium (Cd), % 0 to 0.0050
0
Carbon (C), % 0
0.050 to 0.25
Chromium (Cr), % 0
27 to 30
Cobalt (Co), % 0
48 to 52
Copper (Cu), % 0.7 to 1.3
0
Iron (Fe), % 0 to 0.1
9.7 to 24.5
Lead (Pb), % 0 to 0.0050
0
Magnesium (Mg), % 0.025 to 0.080
0
Manganese (Mn), % 0
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0 to 0.020
0 to 4.0
Niobium (Nb), % 0
0 to 0.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.030
0.5 to 1.5
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 0 to 0.0030
0
Zinc (Zn), % 94.3 to 95.7
0