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5042 Aluminum vs. M1A Magnesium

5042 aluminum belongs to the aluminum alloys classification, while M1A magnesium belongs to the magnesium alloys.

For each property being compared, the top bar is 5042 aluminum and the bottom bar is M1A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
45
Elongation at Break, % 1.1 to 3.4
5.5
Fatigue Strength, MPa 97 to 120
88
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
18
Shear Strength, MPa 200
120
Tensile Strength: Ultimate (UTS), MPa 340 to 360
230
Tensile Strength: Yield (Proof), MPa 270 to 310
130

Thermal Properties

Latent Heat of Fusion, J/g 400
350
Maximum Temperature: Mechanical, °C 180
95
Melting Completion (Liquidus), °C 640
610
Melting Onset (Solidus), °C 570
580
Specific Heat Capacity, J/kg-K 900
990
Thermal Conductivity, W/m-K 130
150
Thermal Expansion, µm/m-K 24
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
35
Electrical Conductivity: Equal Weight (Specific), % IACS 110
190

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
12
Density, g/cm3 2.7
1.7
Embodied Carbon, kg CO2/kg material 8.8
24
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1180
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.6 to 12
11
Resilience: Unit (Modulus of Resilience), kJ/m3 550 to 720
180
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
71
Strength to Weight: Axial, points 35 to 37
38
Strength to Weight: Bending, points 40 to 42
49
Thermal Diffusivity, mm2/s 53
88
Thermal Shock Resistance, points 15 to 16
13

Alloy Composition

Aluminum (Al), % 94.2 to 96.8
0
Calcium (Ca), % 0
0 to 0.3
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 0 to 0.15
0 to 0.050
Iron (Fe), % 0 to 0.35
0
Magnesium (Mg), % 3.0 to 4.0
97.2 to 98.8
Manganese (Mn), % 0.2 to 0.5
1.2 to 2.0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.2
0 to 0.1
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0
0 to 0.3