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AZ81A Magnesium vs. Nickel 890

AZ81A magnesium belongs to the magnesium alloys classification, while nickel 890 belongs to the nickel alloys. There are 26 material properties with values for both materials. Properties with values for just one material (7, 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 AZ81A magnesium and the bottom bar is nickel 890.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
200
Elongation at Break, % 3.0 to 8.8
39
Fatigue Strength, MPa 78 to 80
180
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
78
Shear Strength, MPa 91 to 130
400
Tensile Strength: Ultimate (UTS), MPa 160 to 240
590
Tensile Strength: Yield (Proof), MPa 84
230

Thermal Properties

Latent Heat of Fusion, J/g 350
330
Maximum Temperature: Mechanical, °C 130
1000
Melting Completion (Liquidus), °C 600
1390
Melting Onset (Solidus), °C 500
1340
Specific Heat Capacity, J/kg-K 990
480
Thermal Expansion, µm/m-K 27
14

Otherwise Unclassified Properties

Base Metal Price, % relative 12
47
Density, g/cm3 1.7
8.1
Embodied Carbon, kg CO2/kg material 23
8.2
Embodied Energy, MJ/kg 160
120
Embodied Water, L/kg 990
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.0 to 17
180
Resilience: Unit (Modulus of Resilience), kJ/m3 77 to 78
140
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 70
24
Strength to Weight: Axial, points 26 to 39
20
Strength to Weight: Bending, points 38 to 50
19
Thermal Shock Resistance, points 9.1 to 14
15

Alloy Composition

Aluminum (Al), % 7.0 to 8.1
0.050 to 0.6
Carbon (C), % 0
0.060 to 0.14
Chromium (Cr), % 0
23.5 to 28.5
Copper (Cu), % 0 to 0.1
0 to 0.75
Iron (Fe), % 0
17.3 to 33.9
Magnesium (Mg), % 89.8 to 92.5
0
Manganese (Mn), % 0.13 to 0.35
0 to 1.5
Molybdenum (Mo), % 0
1.0 to 2.0
Nickel (Ni), % 0 to 0.010
40 to 45
Niobium (Nb), % 0
0.2 to 1.0
Silicon (Si), % 0 to 0.3
1.0 to 2.0
Sulfur (S), % 0
0 to 0.015
Tantalum (Ta), % 0
0.1 to 0.6
Titanium (Ti), % 0
0.15 to 0.6
Zinc (Zn), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0