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AZ91A Magnesium vs. Nickel 80A

AZ91A magnesium belongs to the magnesium alloys classification, while nickel 80A belongs to the nickel alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 nickel 80A.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
190
Elongation at Break, % 5.0
22
Fatigue Strength, MPa 99
430
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
74
Shear Strength, MPa 140
660
Tensile Strength: Ultimate (UTS), MPa 240
1040
Tensile Strength: Yield (Proof), MPa 160
710

Thermal Properties

Latent Heat of Fusion, J/g 360
320
Maximum Temperature: Mechanical, °C 130
980
Melting Completion (Liquidus), °C 600
1360
Melting Onset (Solidus), °C 470
1310
Specific Heat Capacity, J/kg-K 990
470
Thermal Conductivity, W/m-K 73
11
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 52
1.6

Otherwise Unclassified Properties

Base Metal Price, % relative 12
55
Density, g/cm3 1.7
8.3
Embodied Carbon, kg CO2/kg material 22
9.8
Embodied Energy, MJ/kg 160
140
Embodied Water, L/kg 990
280

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
210
Resilience: Unit (Modulus of Resilience), kJ/m3 280
1300
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
23
Strength to Weight: Axial, points 38
35
Strength to Weight: Bending, points 49
27
Thermal Diffusivity, mm2/s 42
2.9
Thermal Shock Resistance, points 14
31

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0.5 to 1.8
Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0
18 to 21
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0
0 to 3.0
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 1.0
Nickel (Ni), % 0 to 0.030
69.4 to 79.7
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0
1.8 to 2.7
Zinc (Zn), % 0.35 to 1.0
0