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AZ91B Magnesium vs. Grade CX2M Nickel

AZ91B magnesium belongs to the magnesium alloys classification, while grade CX2M nickel belongs to the nickel alloys. There are 27 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 AZ91B magnesium and the bottom bar is grade CX2M nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
220
Elongation at Break, % 5.0
45
Fatigue Strength, MPa 79
260
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
84
Tensile Strength: Ultimate (UTS), MPa 240
550
Tensile Strength: Yield (Proof), MPa 160
310

Thermal Properties

Latent Heat of Fusion, J/g 360
330
Maximum Temperature: Mechanical, °C 130
990
Melting Completion (Liquidus), °C 600
1500
Melting Onset (Solidus), °C 470
1450
Specific Heat Capacity, J/kg-K 990
430
Thermal Conductivity, W/m-K 73
10
Thermal Expansion, µm/m-K 26
12

Otherwise Unclassified Properties

Base Metal Price, % relative 12
65
Density, g/cm3 1.7
8.7
Embodied Carbon, kg CO2/kg material 22
12
Embodied Energy, MJ/kg 160
160
Embodied Water, L/kg 990
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
210
Resilience: Unit (Modulus of Resilience), kJ/m3 280
220
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
23
Strength to Weight: Axial, points 38
18
Strength to Weight: Bending, points 49
17
Thermal Diffusivity, mm2/s 42
2.7
Thermal Shock Resistance, points 14
15

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.020
Chromium (Cr), % 0
22 to 24
Copper (Cu), % 0 to 0.35
0
Iron (Fe), % 0
0 to 1.5
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 1.0
Molybdenum (Mo), % 0
15 to 16.5
Nickel (Ni), % 0 to 0.030
56.4 to 63
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0
0 to 0.020
Zinc (Zn), % 0.35 to 1.0
0