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EN-MC21120 Magnesium vs. EN AC-45100 Aluminum

EN-MC21120 magnesium belongs to the magnesium alloys classification, while EN AC-45100 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN-MC21120 magnesium and the bottom bar is EN AC-45100 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63 to 75
97 to 130
Elastic (Young's, Tensile) Modulus, GPa 46
72
Elongation at Break, % 2.2 to 6.7
1.0 to 2.8
Fatigue Strength, MPa 84 to 96
82 to 99
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
27
Tensile Strength: Ultimate (UTS), MPa 200 to 270
300 to 360
Tensile Strength: Yield (Proof), MPa 130 to 170
210 to 320

Thermal Properties

Latent Heat of Fusion, J/g 350
470
Maximum Temperature: Mechanical, °C 130
170
Melting Completion (Liquidus), °C 600
630
Melting Onset (Solidus), °C 490
550
Specific Heat Capacity, J/kg-K 990
890
Thermal Conductivity, W/m-K 76
140
Thermal Expansion, µm/m-K 26
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
30
Electrical Conductivity: Equal Weight (Specific), % IACS 59
95

Otherwise Unclassified Properties

Base Metal Price, % relative 12
10
Density, g/cm3 1.7
2.8
Embodied Carbon, kg CO2/kg material 22
7.9
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 990
1100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.0 to 15
3.5 to 7.6
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 320
290 to 710
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
49
Strength to Weight: Axial, points 31 to 43
30 to 35
Strength to Weight: Bending, points 43 to 53
35 to 39
Thermal Diffusivity, mm2/s 44
54
Thermal Shock Resistance, points 11 to 16
14 to 16

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
88 to 92.8
Copper (Cu), % 0 to 0.030
2.6 to 3.6
Iron (Fe), % 0 to 0.0050
0 to 0.6
Lead (Pb), % 0
0 to 0.1
Magnesium (Mg), % 88.6 to 91.3
0.15 to 0.45
Manganese (Mn), % 0.1 to 0.5
0 to 0.55
Nickel (Ni), % 0 to 0.0020
0 to 0.1
Silicon (Si), % 0 to 0.2
4.5 to 6.0
Tin (Sn), % 0
0 to 0.050
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0.35 to 1.0
0 to 0.2
Residuals, % 0 to 0.010
0 to 0.15

Comparable Variants