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AWS BMg-1 vs. 2018 Aluminum

AWS BMg-1 belongs to the magnesium alloys classification, while 2018 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is AWS BMg-1 and the bottom bar is 2018 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 47
73
Elongation at Break, % 3.8
9.6
Fatigue Strength, MPa 72
120
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
27
Shear Strength, MPa 100
270
Tensile Strength: Ultimate (UTS), MPa 180
420
Tensile Strength: Yield (Proof), MPa 110
310

Thermal Properties

Latent Heat of Fusion, J/g 350
390
Maximum Temperature: Mechanical, °C 130
220
Melting Completion (Liquidus), °C 600
640
Melting Onset (Solidus), °C 440
510
Specific Heat Capacity, J/kg-K 980
870
Thermal Conductivity, W/m-K 76
150
Thermal Expansion, µm/m-K 26
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
40
Electrical Conductivity: Equal Weight (Specific), % IACS 55
120

Otherwise Unclassified Properties

Base Metal Price, % relative 12
11
Density, g/cm3 1.8
3.1
Embodied Carbon, kg CO2/kg material 22
8.1
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 980
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.9
37
Resilience: Unit (Modulus of Resilience), kJ/m3 120
670
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 66
45
Strength to Weight: Axial, points 27
38
Strength to Weight: Bending, points 39
41
Thermal Diffusivity, mm2/s 43
57
Thermal Shock Resistance, points 10
19

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
89.7 to 94.4
Beryllium (Be), % 0.00020 to 0.00080
0
Chromium (Cr), % 0
0 to 0.1
Copper (Cu), % 0 to 0.050
3.5 to 4.5
Iron (Fe), % 0 to 0.0050
0 to 1.0
Magnesium (Mg), % 86.1 to 89.8
0.45 to 0.9
Manganese (Mn), % 0.15 to 1.5
0 to 0.2
Nickel (Ni), % 0 to 0.0050
1.7 to 2.3
Silicon (Si), % 0 to 0.050
0 to 0.9
Zinc (Zn), % 1.7 to 2.3
0 to 0.25
Residuals, % 0 to 0.3
0 to 0.15