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R31538 Cobalt vs. ZA-12

R31538 cobalt belongs to the cobalt alloys classification, while ZA-12 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 R31538 cobalt and the bottom bar is ZA-12.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
83
Elongation at Break, % 13 to 23
1.6 to 5.3
Fatigue Strength, MPa 310 to 480
73 to 120
Poisson's Ratio 0.29
0.26
Shear Modulus, GPa 86
33
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
260 to 400
Tensile Strength: Yield (Proof), MPa 580 to 930
210 to 320

Thermal Properties

Latent Heat of Fusion, J/g 320
120
Melting Completion (Liquidus), °C 1360
430
Melting Onset (Solidus), °C 1290
380
Specific Heat Capacity, J/kg-K 450
450
Thermal Conductivity, W/m-K 13
120
Thermal Expansion, µm/m-K 13
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
28
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
42

Otherwise Unclassified Properties

Density, g/cm3 8.4
6.0
Embodied Carbon, kg CO2/kg material 8.1
3.4
Embodied Energy, MJ/kg 110
64
Embodied Water, L/kg 530
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
4.0 to 20
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
260 to 620
Stiffness to Weight: Axial, points 15
7.6
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 34 to 45
12 to 19
Strength to Weight: Bending, points 27 to 32
15 to 20
Thermal Diffusivity, mm2/s 3.5
43
Thermal Shock Resistance, points 25 to 33
9.4 to 14

Alloy Composition

Aluminum (Al), % 0
10.5 to 11.5
Cadmium (Cd), % 0
0 to 0.0060
Carbon (C), % 0.15 to 0.35
0
Chromium (Cr), % 26 to 30
0
Cobalt (Co), % 58.7 to 68.9
0
Copper (Cu), % 0
0.5 to 1.2
Iron (Fe), % 0 to 0.75
0 to 0.075
Lead (Pb), % 0
0 to 0.0060
Magnesium (Mg), % 0
0.015 to 0.030
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 0.060
Tin (Sn), % 0
0 to 0.0030
Zinc (Zn), % 0
87.1 to 89