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AZ91B Magnesium vs. Grade 15 Babbitt Metal

AZ91B magnesium belongs to the magnesium alloys classification, while grade 15 Babbitt Metal belongs to the otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (17, 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 15 Babbitt Metal.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
21
Elastic (Young's, Tensile) Modulus, GPa 46
23
Poisson's Ratio 0.29
0.4
Shear Modulus, GPa 18
8.2

Thermal Properties

Latent Heat of Fusion, J/g 360
46
Melting Completion (Liquidus), °C 600
280
Melting Onset (Solidus), °C 470
250
Specific Heat Capacity, J/kg-K 990
140
Thermal Expansion, µm/m-K 26
26

Otherwise Unclassified Properties

Base Metal Price, % relative 12
17
Density, g/cm3 1.7
10
Embodied Carbon, kg CO2/kg material 22
3.6
Embodied Energy, MJ/kg 160
47
Embodied Water, L/kg 990
840

Common Calculations

Stiffness to Weight: Axial, points 15
1.2
Stiffness to Weight: Bending, points 69
9.0

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0 to 0.0050
Antimony (Sb), % 0
14.5 to 17.5
Arsenic (As), % 0
0.8 to 1.4
Bismuth (Bi), % 0
0 to 0.1
Cadmium (Cd), % 0
0 to 0.050
Copper (Cu), % 0 to 0.35
0 to 0.6
Iron (Fe), % 0
0 to 0.1
Lead (Pb), % 0
79 to 83.9
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
0.8 to 1.2
Zinc (Zn), % 0.35 to 1.0
0 to 0.0050