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Zamak 7 vs. R31233 Cobalt

Zamak 7 belongs to the zinc alloys classification, while R31233 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is Zamak 7 and the bottom bar is R31233 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 86
220
Elongation at Break, % 13
17
Fatigue Strength, MPa 47
220
Poisson's Ratio 0.25
0.29
Shear Modulus, GPa 33
85
Tensile Strength: Ultimate (UTS), MPa 280
1020
Tensile Strength: Yield (Proof), MPa 250
420

Thermal Properties

Latent Heat of Fusion, J/g 120
320
Melting Completion (Liquidus), °C 390
1350
Melting Onset (Solidus), °C 380
1330
Specific Heat Capacity, J/kg-K 410
440
Thermal Conductivity, W/m-K 110
12
Thermal Expansion, µm/m-K 27
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 38
2.1

Otherwise Unclassified Properties

Density, g/cm3 6.4
8.6
Embodied Carbon, kg CO2/kg material 3.0
8.4
Embodied Energy, MJ/kg 57
110
Embodied Water, L/kg 380
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 36
140
Resilience: Unit (Modulus of Resilience), kJ/m3 370
410
Stiffness to Weight: Axial, points 7.5
14
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 12
33
Strength to Weight: Bending, points 15
26
Thermal Diffusivity, mm2/s 43
3.2
Thermal Shock Resistance, points 8.6
25

Alloy Composition

Aluminum (Al), % 3.5 to 4.3
0
Boron (B), % 0
0 to 0.015
Cadmium (Cd), % 0 to 0.0020
0
Carbon (C), % 0
0.020 to 0.1
Chromium (Cr), % 0
23.5 to 27.5
Cobalt (Co), % 0
44.7 to 63.3
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 0 to 0.075
1.0 to 5.0
Lead (Pb), % 0 to 0.0030
0
Magnesium (Mg), % 0.0050 to 0.020
0
Manganese (Mn), % 0
0.1 to 1.5
Molybdenum (Mo), % 0
4.0 to 6.0
Nickel (Ni), % 0.0050 to 0.020
7.0 to 11
Nitrogen (N), % 0
0.030 to 0.12
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0.050 to 1.0
Sulfur (S), % 0
0 to 0.020
Tin (Sn), % 0 to 0.0010
0
Tungsten (W), % 0
1.0 to 3.0
Zinc (Zn), % 95.3 to 96.5
0