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4145 Aluminum vs. M1A Magnesium

4145 aluminum belongs to the aluminum alloys classification, while M1A magnesium belongs to the magnesium 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 4145 aluminum and the bottom bar is M1A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
45
Elongation at Break, % 2.2
5.5
Fatigue Strength, MPa 48
88
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 28
18
Shear Strength, MPa 69
120
Tensile Strength: Ultimate (UTS), MPa 120
230
Tensile Strength: Yield (Proof), MPa 68
130

Thermal Properties

Latent Heat of Fusion, J/g 540
350
Maximum Temperature: Mechanical, °C 160
95
Melting Completion (Liquidus), °C 590
610
Melting Onset (Solidus), °C 520
580
Specific Heat Capacity, J/kg-K 880
990
Thermal Conductivity, W/m-K 100
150
Thermal Expansion, µm/m-K 21
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
35
Electrical Conductivity: Equal Weight (Specific), % IACS 84
190

Otherwise Unclassified Properties

Base Metal Price, % relative 10
12
Density, g/cm3 2.8
1.7
Embodied Carbon, kg CO2/kg material 7.6
24
Embodied Energy, MJ/kg 140
160
Embodied Water, L/kg 1040
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3
11
Resilience: Unit (Modulus of Resilience), kJ/m3 31
180
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
71
Strength to Weight: Axial, points 12
38
Strength to Weight: Bending, points 19
49
Thermal Diffusivity, mm2/s 42
88
Thermal Shock Resistance, points 5.5
13

Alloy Composition

Aluminum (Al), % 83 to 87.4
0
Calcium (Ca), % 0
0 to 0.3
Chromium (Cr), % 0 to 0.15
0
Copper (Cu), % 3.3 to 4.7
0 to 0.050
Iron (Fe), % 0 to 0.8
0
Magnesium (Mg), % 0 to 0.15
97.2 to 98.8
Manganese (Mn), % 0 to 0.15
1.2 to 2.0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 9.3 to 10.7
0 to 0.1
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0
0 to 0.3