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238.0 Aluminum vs. AS41A Magnesium

238.0 aluminum belongs to the aluminum alloys classification, while AS41A magnesium belongs to the magnesium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (1, 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 238.0 aluminum and the bottom bar is AS41A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 76
45
Elongation at Break, % 1.5
11
Fatigue Strength, MPa 110
100
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 28
17
Tensile Strength: Ultimate (UTS), MPa 210
230
Tensile Strength: Yield (Proof), MPa 170
140

Thermal Properties

Latent Heat of Fusion, J/g 430
370
Maximum Temperature: Mechanical, °C 170
110
Melting Completion (Liquidus), °C 600
620
Melting Onset (Solidus), °C 510
570
Specific Heat Capacity, J/kg-K 840
1000
Thermal Conductivity, W/m-K 100
68
Thermal Expansion, µm/m-K 21
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
17
Electrical Conductivity: Equal Weight (Specific), % IACS 67
92

Otherwise Unclassified Properties

Base Metal Price, % relative 12
12
Density, g/cm3 3.4
1.6
Embodied Carbon, kg CO2/kg material 7.4
23
Embodied Energy, MJ/kg 140
160
Embodied Water, L/kg 1040
980

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.9
21
Resilience: Unit (Modulus of Resilience), kJ/m3 180
220
Stiffness to Weight: Axial, points 12
15
Stiffness to Weight: Bending, points 42
72
Strength to Weight: Axial, points 17
38
Strength to Weight: Bending, points 23
50
Thermal Diffusivity, mm2/s 37
41
Thermal Shock Resistance, points 9.1
14

Alloy Composition

Aluminum (Al), % 81.9 to 84.9
3.5 to 5.0
Copper (Cu), % 9.5 to 10.5
0 to 0.060
Iron (Fe), % 1.0 to 1.5
0
Magnesium (Mg), % 0 to 0.25
92.8 to 95.8
Manganese (Mn), % 0
0.2 to 0.5
Nickel (Ni), % 0
0 to 0.030
Silicon (Si), % 3.6 to 4.4
0.5 to 1.5
Zinc (Zn), % 1.0 to 1.5
0 to 0.12