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R30075 Cobalt vs. Zamak 2

R30075 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 (9, in this case) are not shown.

For each property being compared, the top bar is R30075 cobalt and the bottom bar is Zamak 2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
87
Elongation at Break, % 12
6.0
Fatigue Strength, MPa 250 to 840
59
Poisson's Ratio 0.29
0.26
Shear Modulus, GPa 82 to 98
33
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
360
Tensile Strength: Yield (Proof), MPa 480 to 840
270

Thermal Properties

Latent Heat of Fusion, J/g 320
130
Melting Completion (Liquidus), °C 1360
390
Melting Onset (Solidus), °C 1290
380
Specific Heat Capacity, J/kg-K 450
410
Thermal Conductivity, W/m-K 13
110
Thermal Expansion, µm/m-K 12
28

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
25
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
35

Otherwise Unclassified Properties

Density, g/cm3 8.4
6.5
Embodied Carbon, kg CO2/kg material 8.1
3.0
Embodied Energy, MJ/kg 110
57
Embodied Water, L/kg 530
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 140
20
Resilience: Unit (Modulus of Resilience), kJ/m3 560 to 1410
420
Stiffness to Weight: Axial, points 14 to 17
7.5
Stiffness to Weight: Bending, points 24 to 25
23
Strength to Weight: Axial, points 26 to 42
15
Strength to Weight: Bending, points 22 to 31
17
Thermal Diffusivity, mm2/s 3.5
41
Thermal Shock Resistance, points 21 to 29
11

Alloy Composition

Aluminum (Al), % 0 to 0.1
3.5 to 4.3
Boron (B), % 0 to 0.010
0
Cadmium (Cd), % 0
0 to 0.0050
Carbon (C), % 0 to 0.35
0
Chromium (Cr), % 27 to 30
0
Cobalt (Co), % 58.7 to 68
0
Copper (Cu), % 0
2.5 to 3.3
Iron (Fe), % 0 to 0.75
0 to 0.1
Lead (Pb), % 0
0 to 0.0050
Magnesium (Mg), % 0
0.020 to 0.060
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 0.5
0 to 0.020
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 1.0
0 to 0.030
Sulfur (S), % 0 to 0.010
0
Tin (Sn), % 0
0 to 0.0030
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0 to 0.2
0
Zinc (Zn), % 0
92.2 to 94