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R31537 Cobalt vs. ZA-27

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

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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