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R30006 Cobalt vs. Zamak 7

R30006 cobalt belongs to the cobalt alloys classification, while Zamak 7 belongs to the zinc alloys. There are 28 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 R30006 cobalt and the bottom bar is Zamak 7.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 1520
410
Elastic (Young's, Tensile) Modulus, GPa 220
86
Elongation at Break, % 1.0
13
Fatigue Strength, MPa 260
47
Poisson's Ratio 0.28
0.25
Shear Modulus, GPa 85
33
Tensile Strength: Ultimate (UTS), MPa 900
280
Tensile Strength: Yield (Proof), MPa 540
250

Thermal Properties

Latent Heat of Fusion, J/g 320
120
Melting Completion (Liquidus), °C 1400
390
Melting Onset (Solidus), °C 1290
380
Specific Heat Capacity, J/kg-K 450
410
Thermal Conductivity, W/m-K 15
110
Thermal Expansion, µm/m-K 11
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
27
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
38

Otherwise Unclassified Properties

Density, g/cm3 8.6
6.4
Embodied Carbon, kg CO2/kg material 7.8
3.0
Embodied Energy, MJ/kg 110
57
Embodied Water, L/kg 500
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
36
Resilience: Unit (Modulus of Resilience), kJ/m3 670
370
Stiffness to Weight: Axial, points 14
7.5
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 29
12
Strength to Weight: Bending, points 24
15
Thermal Diffusivity, mm2/s 3.9
43
Thermal Shock Resistance, points 26
8.6

Alloy Composition

Aluminum (Al), % 0
3.5 to 4.3
Cadmium (Cd), % 0
0 to 0.0020
Carbon (C), % 0.9 to 1.4
0
Chromium (Cr), % 27 to 32
0
Cobalt (Co), % 48.6 to 68.1
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 3.0
0 to 0.075
Lead (Pb), % 0
0 to 0.0030
Magnesium (Mg), % 0
0.0050 to 0.020
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
0.0050 to 0.020
Silicon (Si), % 0 to 2.0
0
Tin (Sn), % 0
0 to 0.0010
Tungsten (W), % 4.0 to 6.0
0
Zinc (Zn), % 0
95.3 to 96.5