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AZ91B Magnesium vs. Monel K-500

AZ91B magnesium belongs to the magnesium alloys classification, while Monel K-500 belongs to the nickel alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, 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 Monel K-500.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
160
Elongation at Break, % 5.0
25 to 36
Fatigue Strength, MPa 79
260 to 560
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 18
61
Shear Strength, MPa 140
430 to 700
Tensile Strength: Ultimate (UTS), MPa 240
640 to 1100
Tensile Strength: Yield (Proof), MPa 160
310 to 880

Thermal Properties

Latent Heat of Fusion, J/g 360
270
Maximum Temperature: Mechanical, °C 130
900
Melting Completion (Liquidus), °C 600
1350
Melting Onset (Solidus), °C 470
1320
Specific Heat Capacity, J/kg-K 990
440
Thermal Conductivity, W/m-K 73
18
Thermal Expansion, µm/m-K 26
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 58
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 12
50
Density, g/cm3 1.7
8.7
Embodied Carbon, kg CO2/kg material 22
8.1
Embodied Energy, MJ/kg 160
120
Embodied Water, L/kg 990
280

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
180 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 280
300 to 2420
Stiffness to Weight: Axial, points 15
10
Stiffness to Weight: Bending, points 69
21
Strength to Weight: Axial, points 38
21 to 35
Strength to Weight: Bending, points 49
19 to 27
Thermal Diffusivity, mm2/s 42
4.8
Thermal Shock Resistance, points 14
21 to 36

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
2.3 to 3.2
Carbon (C), % 0
0 to 0.18
Copper (Cu), % 0 to 0.35
27 to 33
Iron (Fe), % 0
0 to 2.0
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 1.5
Nickel (Ni), % 0 to 0.030
63 to 70.4
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0
0.35 to 0.85
Zinc (Zn), % 0.35 to 1.0
0