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AZ91B Magnesium vs. Grade 3 Babbitt Metal

AZ91B magnesium belongs to the magnesium alloys classification, while grade 3 Babbitt Metal belongs to the otherwise unclassified metals. There are 19 material properties with values for both materials. Properties with values for just one material (14, 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 3 Babbitt Metal.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
27
Compressive (Crushing) Strength, MPa 160
120
Elastic (Young's, Tensile) Modulus, GPa 46
56
Poisson's Ratio 0.29
0.35
Shear Modulus, GPa 18
21
Tensile Strength: Yield (Proof), MPa 160
46

Thermal Properties

Latent Heat of Fusion, J/g 360
79
Melting Completion (Liquidus), °C 600
420
Melting Onset (Solidus), °C 470
240
Specific Heat Capacity, J/kg-K 990
230
Thermal Expansion, µm/m-K 26
21

Otherwise Unclassified Properties

Base Metal Price, % relative 12
70
Density, g/cm3 1.7
7.4
Embodied Carbon, kg CO2/kg material 22
12
Embodied Energy, MJ/kg 160
200
Embodied Water, L/kg 990
1210

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 280
19
Stiffness to Weight: Axial, points 15
4.2
Stiffness to Weight: Bending, points 69
17

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0 to 0.0050
Antimony (Sb), % 0
7.5 to 8.5
Arsenic (As), % 0
0 to 0.1
Bismuth (Bi), % 0
0 to 0.080
Cadmium (Cd), % 0
0 to 0.050
Copper (Cu), % 0 to 0.35
7.5 to 8.5
Iron (Fe), % 0
0 to 0.080
Lead (Pb), % 0
0 to 0.35
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0
Tin (Sn), % 0
82.3 to 85
Zinc (Zn), % 0.35 to 1.0
0 to 0.0050