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Zamak 5 vs. R30816 Cobalt

Zamak 5 belongs to the zinc alloys classification, while R30816 cobalt belongs to the cobalt 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 Zamak 5 and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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