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G-CoCr28 Cobalt vs. Zamak 2

G-CoCr28 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 (8, in this case) are not shown.

For each property being compared, the top bar is G-CoCr28 cobalt and the bottom bar is Zamak 2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
87
Elongation at Break, % 6.7
6.0
Fatigue Strength, MPa 130
59
Poisson's Ratio 0.28
0.26
Shear Modulus, GPa 83
33
Tensile Strength: Ultimate (UTS), MPa 560
360
Tensile Strength: Yield (Proof), MPa 260
270

Thermal Properties

Latent Heat of Fusion, J/g 320
130
Maximum Temperature: Mechanical, °C 1200
95
Melting Completion (Liquidus), °C 1330
390
Melting Onset (Solidus), °C 1270
380
Specific Heat Capacity, J/kg-K 470
410
Thermal Conductivity, W/m-K 8.5
110
Thermal Expansion, µm/m-K 14
28

Otherwise Unclassified Properties

Base Metal Price, % relative 100
12
Density, g/cm3 8.1
6.5
Embodied Carbon, kg CO2/kg material 6.2
3.0
Embodied Energy, MJ/kg 84
57
Embodied Water, L/kg 440
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
20
Resilience: Unit (Modulus of Resilience), kJ/m3 160
420
Stiffness to Weight: Axial, points 15
7.5
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 19
15
Strength to Weight: Bending, points 19
17
Thermal Diffusivity, mm2/s 2.2
41
Thermal Shock Resistance, points 14
11

Alloy Composition

Aluminum (Al), % 0
3.5 to 4.3
Cadmium (Cd), % 0
0 to 0.0050
Carbon (C), % 0.050 to 0.25
0
Chromium (Cr), % 27 to 30
0
Cobalt (Co), % 48 to 52
0
Copper (Cu), % 0
2.5 to 3.3
Iron (Fe), % 9.7 to 24.5
0 to 0.1
Lead (Pb), % 0
0 to 0.0050
Magnesium (Mg), % 0
0.020 to 0.060
Manganese (Mn), % 0 to 1.5
0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 4.0
0 to 0.020
Niobium (Nb), % 0 to 0.5
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0.5 to 1.5
0 to 0.030
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
0 to 0.0030
Zinc (Zn), % 0
92.2 to 94