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ZC63A Magnesium vs. R30155 Cobalt

ZC63A magnesium belongs to the magnesium alloys classification, while R30155 cobalt belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is ZC63A magnesium and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 60
220
Elastic (Young's, Tensile) Modulus, GPa 48
210
Elongation at Break, % 3.3
34
Fatigue Strength, MPa 94
310
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 19
81
Shear Strength, MPa 130
570
Tensile Strength: Ultimate (UTS), MPa 220
850
Tensile Strength: Yield (Proof), MPa 130
390

Thermal Properties

Latent Heat of Fusion, J/g 330
300
Maximum Temperature: Mechanical, °C 98
1100
Melting Completion (Liquidus), °C 550
1470
Melting Onset (Solidus), °C 470
1420
Specific Heat Capacity, J/kg-K 950
450
Thermal Conductivity, W/m-K 120
12
Thermal Expansion, µm/m-K 26
14

Otherwise Unclassified Properties

Base Metal Price, % relative 13
80
Density, g/cm3 2.1
8.5
Embodied Carbon, kg CO2/kg material 22
9.7
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 920
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.3
230
Resilience: Unit (Modulus of Resilience), kJ/m3 190
370
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 58
23
Strength to Weight: Axial, points 29
28
Strength to Weight: Bending, points 38
24
Thermal Diffusivity, mm2/s 58
3.2
Thermal Shock Resistance, points 12
21

Alloy Composition


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Carbon (C), % 0
0.080 to 0.16
Chromium (Cr), % 0
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 2.4 to 3.0
0
Iron (Fe), % 0
24.3 to 36.2
Magnesium (Mg), % 89.2 to 91.9
0
Manganese (Mn), % 0.25 to 0.75
1.0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0 to 0.010
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.2
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tungsten (W), % 0
2.0 to 3.0
Zinc (Zn), % 5.5 to 6.5
0
Residuals, % 0 to 0.3
0