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AWS BMg-1 vs. Grade 7 Babbitt Metal

AWS BMg-1 belongs to the magnesium alloys classification, while grade 7 Babbitt Metal belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (16, 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 AWS BMg-1 and the bottom bar is grade 7 Babbitt Metal.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 47
26
Poisson's Ratio 0.29
0.4
Shear Modulus, GPa 18
9.1
Tensile Strength: Yield (Proof), MPa 110
25

Thermal Properties

Latent Heat of Fusion, J/g 350
48
Melting Completion (Liquidus), °C 600
270
Melting Onset (Solidus), °C 440
240
Specific Heat Capacity, J/kg-K 980
150
Thermal Expansion, µm/m-K 26
26

Otherwise Unclassified Properties

Base Metal Price, % relative 12
23
Density, g/cm3 1.8
10
Embodied Carbon, kg CO2/kg material 22
4.4
Embodied Energy, MJ/kg 160
62
Embodied Water, L/kg 980
880

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 120
12
Stiffness to Weight: Axial, points 14
1.4
Stiffness to Weight: Bending, points 66
9.6

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0 to 0.0050
Antimony (Sb), % 0
14 to 16
Arsenic (As), % 0
0.3 to 0.6
Beryllium (Be), % 0.00020 to 0.00080
0
Bismuth (Bi), % 0
0 to 0.1
Cadmium (Cd), % 0
0 to 0.050
Copper (Cu), % 0 to 0.050
0 to 0.5
Iron (Fe), % 0 to 0.0050
0 to 0.1
Lead (Pb), % 0
71.9 to 76.4
Magnesium (Mg), % 86.1 to 89.8
0
Manganese (Mn), % 0.15 to 1.5
0
Nickel (Ni), % 0 to 0.0050
0
Silicon (Si), % 0 to 0.050
0
Tin (Sn), % 0
9.3 to 10.7
Zinc (Zn), % 1.7 to 2.3
0 to 0.0050
Residuals, % 0 to 0.3
0