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AZ91B Magnesium vs. Nickel 908

AZ91B magnesium belongs to the magnesium alloys classification, while nickel 908 belongs to the nickel alloys. There are 28 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 nickel 908.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
180
Elongation at Break, % 5.0
11
Fatigue Strength, MPa 79
450
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 18
70
Shear Strength, MPa 140
800
Tensile Strength: Ultimate (UTS), MPa 240
1340
Tensile Strength: Yield (Proof), MPa 160
930

Thermal Properties

Latent Heat of Fusion, J/g 360
290
Maximum Temperature: Mechanical, °C 130
920
Melting Completion (Liquidus), °C 600
1430
Melting Onset (Solidus), °C 470
1380
Specific Heat Capacity, J/kg-K 990
460
Thermal Conductivity, W/m-K 73
11
Thermal Expansion, µm/m-K 26
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 12
50
Density, g/cm3 1.7
8.3
Embodied Carbon, kg CO2/kg material 22
9.3
Embodied Energy, MJ/kg 160
140
Embodied Water, L/kg 990
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
140
Resilience: Unit (Modulus of Resilience), kJ/m3 280
2340
Stiffness to Weight: Axial, points 15
12
Stiffness to Weight: Bending, points 69
23
Strength to Weight: Axial, points 38
45
Strength to Weight: Bending, points 49
33
Thermal Diffusivity, mm2/s 42
2.9
Thermal Shock Resistance, points 14
61

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0.75 to 1.3
Boron (B), % 0
0 to 0.012
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
3.8 to 4.5
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0 to 0.35
0 to 0.5
Iron (Fe), % 0
35.6 to 44.6
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 1.0
Nickel (Ni), % 0 to 0.030
47 to 51
Niobium (Nb), % 0
2.7 to 3.3
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0
0 to 0.0050
Titanium (Ti), % 0
1.2 to 1.8
Zinc (Zn), % 0.35 to 1.0
0