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ZA-8 vs. R30605 Cobalt

ZA-8 belongs to the zinc alloys classification, while R30605 cobalt belongs to the cobalt alloys. There are 25 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is ZA-8 and the bottom bar is R30605 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 85 to 86
210
Elongation at Break, % 1.3 to 8.0
34
Fatigue Strength, MPa 51 to 100
260 to 590
Poisson's Ratio 0.26
0.29
Shear Modulus, GPa 34
81
Tensile Strength: Ultimate (UTS), MPa 210 to 370
1130 to 1900
Tensile Strength: Yield (Proof), MPa 210 to 290
470 to 1600

Thermal Properties

Latent Heat of Fusion, J/g 110
290
Melting Completion (Liquidus), °C 400
1410
Melting Onset (Solidus), °C 380
1330
Specific Heat Capacity, J/kg-K 440
410
Thermal Conductivity, W/m-K 120
9.6
Thermal Expansion, µm/m-K 23
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 28
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 40
1.8

Otherwise Unclassified Properties

Density, g/cm3 6.3
9.6
Embodied Carbon, kg CO2/kg material 3.3
9.8
Embodied Energy, MJ/kg 62
140
Embodied Water, L/kg 420
450

Common Calculations

Stiffness to Weight: Axial, points 7.5
12
Stiffness to Weight: Bending, points 23
21
Strength to Weight: Axial, points 9.3 to 17
33 to 55
Strength to Weight: Bending, points 12 to 18
25 to 36
Thermal Diffusivity, mm2/s 42
2.5
Thermal Shock Resistance, points 7.6 to 13
31 to 52

Alloy Composition

Aluminum (Al), % 8.0 to 8.8
0
Cadmium (Cd), % 0 to 0.0060
0
Carbon (C), % 0
0.050 to 0.15
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
46.4 to 57
Copper (Cu), % 0.8 to 1.3
0
Iron (Fe), % 0 to 0.075
0 to 3.0
Lead (Pb), % 0 to 0.0060
0
Magnesium (Mg), % 0.015 to 0.030
0
Manganese (Mn), % 0
1.0 to 2.0
Nickel (Ni), % 0 to 0.020
9.0 to 11
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.045
0 to 0.4
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 0 to 0.0030
0
Tungsten (W), % 0
14 to 16
Zinc (Zn), % 89.7 to 91.2
0

Comparable Variants