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Zamak 2 vs. R30075 Cobalt

Zamak 2 belongs to the zinc alloys classification, while R30075 cobalt belongs to the cobalt 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 Zamak 2 and the bottom bar is R30075 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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