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AZ91D Magnesium vs. Grade CW6MC Nickel

AZ91D magnesium belongs to the magnesium alloys classification, while grade CW6MC nickel belongs to the nickel alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, 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 AZ91D magnesium and the bottom bar is grade CW6MC nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
200
Elongation at Break, % 2.3 to 4.5
28
Fatigue Strength, MPa 74 to 85
210
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
79
Tensile Strength: Ultimate (UTS), MPa 160 to 220
540
Tensile Strength: Yield (Proof), MPa 80 to 130
310

Thermal Properties

Latent Heat of Fusion, J/g 350
330
Maximum Temperature: Mechanical, °C 130
980
Melting Completion (Liquidus), °C 600
1480
Melting Onset (Solidus), °C 490
1430
Specific Heat Capacity, J/kg-K 990
440
Thermal Conductivity, W/m-K 78
11
Thermal Expansion, µm/m-K 27
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
1.3
Electrical Conductivity: Equal Weight (Specific), % IACS 58
1.4

Otherwise Unclassified Properties

Base Metal Price, % relative 12
80
Density, g/cm3 1.7
8.6
Embodied Carbon, kg CO2/kg material 22
14
Embodied Energy, MJ/kg 160
200
Embodied Water, L/kg 990
290

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.2 to 7.7
130
Resilience: Unit (Modulus of Resilience), kJ/m3 69 to 170
240
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
23
Strength to Weight: Axial, points 26 to 34
18
Strength to Weight: Bending, points 38 to 46
17
Thermal Diffusivity, mm2/s 45
2.8
Thermal Shock Resistance, points 9.5 to 13
15

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.060
Chromium (Cr), % 0
20 to 23
Copper (Cu), % 0 to 0.030
0
Iron (Fe), % 0 to 0.0050
0 to 5.0
Magnesium (Mg), % 88.7 to 91.2
0
Manganese (Mn), % 0.15 to 0.5
0 to 1.0
Molybdenum (Mo), % 0
8.0 to 10
Nickel (Ni), % 0 to 0.0020
55.4 to 68.9
Niobium (Nb), % 0
3.2 to 4.5
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 0.1
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0.35 to 1.0
0