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AWS BMg-1 vs. 2218 Aluminum

AWS BMg-1 belongs to the magnesium alloys classification, while 2218 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 2218 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 47
73
Elongation at Break, % 3.8
6.8 to 10
Fatigue Strength, MPa 72
110
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
27
Shear Strength, MPa 100
210 to 250
Tensile Strength: Ultimate (UTS), MPa 180
330 to 430
Tensile Strength: Yield (Proof), MPa 110
260 to 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
140
Thermal Expansion, µm/m-K 26
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
37
Electrical Conductivity: Equal Weight (Specific), % IACS 55
110

Otherwise Unclassified Properties

Base Metal Price, % relative 12
11
Density, g/cm3 1.8
3.1
Embodied Carbon, kg CO2/kg material 22
8.2
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 980
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.9
27 to 31
Resilience: Unit (Modulus of Resilience), kJ/m3 120
450 to 650
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 66
45
Strength to Weight: Axial, points 27
30 to 39
Strength to Weight: Bending, points 39
34 to 41
Thermal Diffusivity, mm2/s 43
52
Thermal Shock Resistance, points 10
15 to 19

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
88.8 to 93.6
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
1.2 to 1.8
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
0 to 0.15