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ZA-27 vs. R31537 Cobalt

ZA-27 belongs to the zinc alloys classification, while R31537 cobalt belongs to the cobalt alloys. There are 27 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-27 and the bottom bar is R31537 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 78
220
Elongation at Break, % 2.0 to 4.5
14 to 23
Fatigue Strength, MPa 110 to 170
310 to 480
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 31
87
Tensile Strength: Ultimate (UTS), MPa 400 to 430
1000 to 1340
Tensile Strength: Yield (Proof), MPa 260 to 370
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 130
320
Melting Completion (Liquidus), °C 480
1360
Melting Onset (Solidus), °C 380
1290
Specific Heat Capacity, J/kg-K 530
450
Thermal Conductivity, W/m-K 130
13
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 30
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 53
2.1

Otherwise Unclassified Properties

Density, g/cm3 5.0
8.4
Embodied Carbon, kg CO2/kg material 4.2
8.1
Embodied Energy, MJ/kg 80
110
Embodied Water, L/kg 570
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 8.1 to 18
140 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 420 to 890
780 to 1990
Stiffness to Weight: Axial, points 8.6
15
Stiffness to Weight: Bending, points 28
24
Strength to Weight: Axial, points 22 to 24
33 to 44
Strength to Weight: Bending, points 24 to 25
26 to 32
Thermal Diffusivity, mm2/s 47
3.4
Thermal Shock Resistance, points 14 to 15
24 to 32

Alloy Composition

Aluminum (Al), % 25 to 28
0
Cadmium (Cd), % 0 to 0.0060
0
Carbon (C), % 0
0 to 0.14
Chromium (Cr), % 0
26 to 30
Cobalt (Co), % 0
58.9 to 69
Copper (Cu), % 2.0 to 2.5
0
Iron (Fe), % 0 to 0.1
0 to 0.75
Lead (Pb), % 0 to 0.0060
0
Magnesium (Mg), % 0.010 to 0.020
0
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 0 to 0.020
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Silicon (Si), % 0 to 0.080
0 to 1.0
Tin (Sn), % 0 to 0.0030
0
Zinc (Zn), % 69.3 to 73
0