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R30816 Cobalt vs. Zamak 5

R30816 cobalt belongs to the cobalt alloys classification, while Zamak 5 belongs to the zinc alloys. There are 26 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is R30816 cobalt and the bottom bar is Zamak 5.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280
92
Elastic (Young's, Tensile) Modulus, GPa 210
87
Elongation at Break, % 23
6.3
Fatigue Strength, MPa 250
56
Poisson's Ratio 0.3
0.25
Shear Modulus, GPa 81
33
Tensile Strength: Ultimate (UTS), MPa 1020
330
Tensile Strength: Yield (Proof), MPa 460
240

Thermal Properties

Latent Heat of Fusion, J/g 300
120
Melting Completion (Liquidus), °C 1540
390
Melting Onset (Solidus), °C 1460
380
Specific Heat Capacity, J/kg-K 420
410
Thermal Conductivity, W/m-K 13
110
Thermal Expansion, µm/m-K 12
27

Otherwise Unclassified Properties

Density, g/cm3 9.1
6.4
Embodied Carbon, kg CO2/kg material 20
3.0
Embodied Energy, MJ/kg 320
57
Embodied Water, L/kg 440
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
19
Resilience: Unit (Modulus of Resilience), kJ/m3 510
330
Stiffness to Weight: Axial, points 13
7.5
Stiffness to Weight: Bending, points 22
23
Strength to Weight: Axial, points 31
14
Strength to Weight: Bending, points 25
16
Thermal Diffusivity, mm2/s 3.3
42
Thermal Shock Resistance, points 28
9.9

Alloy Composition

Aluminum (Al), % 0
3.5 to 4.3
Cadmium (Cd), % 0
0 to 0.0050
Carbon (C), % 0.32 to 0.42
0
Chromium (Cr), % 19 to 21
0
Cobalt (Co), % 40 to 49.8
0
Copper (Cu), % 0
0.7 to 1.3
Iron (Fe), % 0 to 5.0
0 to 0.1
Lead (Pb), % 0
0 to 0.0050
Magnesium (Mg), % 0
0.025 to 0.080
Manganese (Mn), % 1.0 to 2.0
0
Molybdenum (Mo), % 3.5 to 4.5
0
Nickel (Ni), % 19 to 21
0 to 0.020
Niobium (Nb), % 3.5 to 4.5
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.030
Sulfur (S), % 0 to 0.030
0
Tantalum (Ta), % 3.5 to 4.5
0
Tin (Sn), % 0
0 to 0.0030
Tungsten (W), % 3.5 to 4.5
0
Zinc (Zn), % 0
94.3 to 95.7