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AZ91A Magnesium vs. Grade CY40 Nickel

AZ91A magnesium belongs to the magnesium alloys classification, while grade CY40 nickel belongs to the nickel alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, 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 AZ91A magnesium and the bottom bar is grade CY40 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
190
Elongation at Break, % 5.0
34
Fatigue Strength, MPa 99
160
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
74
Tensile Strength: Ultimate (UTS), MPa 240
540
Tensile Strength: Yield (Proof), MPa 160
220

Thermal Properties

Latent Heat of Fusion, J/g 360
330
Maximum Temperature: Mechanical, °C 130
960
Melting Completion (Liquidus), °C 600
1350
Melting Onset (Solidus), °C 470
1300
Specific Heat Capacity, J/kg-K 990
470
Thermal Conductivity, W/m-K 73
14
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 52
1.8

Otherwise Unclassified Properties

Base Metal Price, % relative 12
55
Density, g/cm3 1.7
8.4
Embodied Carbon, kg CO2/kg material 22
9.1
Embodied Energy, MJ/kg 160
130
Embodied Water, L/kg 990
260

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
150
Resilience: Unit (Modulus of Resilience), kJ/m3 280
130
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
23
Strength to Weight: Axial, points 38
18
Strength to Weight: Bending, points 49
18
Thermal Diffusivity, mm2/s 42
3.7
Thermal Shock Resistance, points 14
16

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.4
Chromium (Cr), % 0
14 to 17
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0
0 to 11
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 1.5
Nickel (Ni), % 0 to 0.030
67 to 86
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 3.0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0.35 to 1.0
0