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ZA-27 vs. R30035 Cobalt

ZA-27 belongs to the zinc alloys classification, while R30035 cobalt belongs to the cobalt alloys. There are 28 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is ZA-27 and the bottom bar is R30035 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 78
220 to 230
Elongation at Break, % 2.0 to 4.5
9.0 to 46
Fatigue Strength, MPa 110 to 170
170 to 740
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 31
84 to 89
Tensile Strength: Ultimate (UTS), MPa 400 to 430
900 to 1900
Tensile Strength: Yield (Proof), MPa 260 to 370
300 to 1650

Thermal Properties

Latent Heat of Fusion, J/g 130
320
Melting Completion (Liquidus), °C 480
1440
Melting Onset (Solidus), °C 380
1320
Specific Heat Capacity, J/kg-K 530
440
Thermal Conductivity, W/m-K 130
11
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 30
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 53
1.8

Otherwise Unclassified Properties

Base Metal Price, % relative 11
100
Density, g/cm3 5.0
8.7
Embodied Carbon, kg CO2/kg material 4.2
10
Embodied Energy, MJ/kg 80
140
Embodied Water, L/kg 570
410

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 8.1 to 18
160 to 320
Resilience: Unit (Modulus of Resilience), kJ/m3 420 to 890
210 to 5920
Stiffness to Weight: Axial, points 8.6
14 to 15
Stiffness to Weight: Bending, points 28
23 to 24
Strength to Weight: Axial, points 22 to 24
29 to 61
Strength to Weight: Bending, points 24 to 25
24 to 39
Thermal Diffusivity, mm2/s 47
3.0
Thermal Shock Resistance, points 14 to 15
23 to 46

Alloy Composition

Aluminum (Al), % 25 to 28
0
Boron (B), % 0
0 to 0.015
Cadmium (Cd), % 0 to 0.0060
0
Carbon (C), % 0
0 to 0.025
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
29.1 to 39
Copper (Cu), % 2.0 to 2.5
0
Iron (Fe), % 0 to 0.1
0 to 1.0
Lead (Pb), % 0 to 0.0060
0
Magnesium (Mg), % 0.010 to 0.020
0
Manganese (Mn), % 0
0 to 0.15
Molybdenum (Mo), % 0
9.0 to 10.5
Nickel (Ni), % 0 to 0.020
33 to 37
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 0.080
0 to 0.15
Sulfur (S), % 0
0 to 0.010
Tin (Sn), % 0 to 0.0030
0
Titanium (Ti), % 0
0 to 1.0
Zinc (Zn), % 69.3 to 73
0