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6351 Aluminum vs. M1A Magnesium

6351 aluminum belongs to the aluminum alloys classification, while M1A magnesium belongs to the magnesium alloys.

For each property being compared, the top bar is 6351 aluminum and the bottom bar is M1A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
45
Elongation at Break, % 7.8 to 18
5.5
Fatigue Strength, MPa 79 to 130
88
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
18
Shear Strength, MPa 84 to 200
120
Tensile Strength: Ultimate (UTS), MPa 140 to 310
230
Tensile Strength: Yield (Proof), MPa 95 to 270
130

Thermal Properties

Latent Heat of Fusion, J/g 410
350
Maximum Temperature: Mechanical, °C 160
95
Melting Completion (Liquidus), °C 650
610
Melting Onset (Solidus), °C 570
580
Specific Heat Capacity, J/kg-K 900
990
Thermal Conductivity, W/m-K 180
150
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 46
35
Electrical Conductivity: Equal Weight (Specific), % IACS 150
190

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
12
Density, g/cm3 2.7
1.7
Embodied Carbon, kg CO2/kg material 8.3
24
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1180
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20 to 38
11
Resilience: Unit (Modulus of Resilience), kJ/m3 65 to 540
180
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
71
Strength to Weight: Axial, points 14 to 32
38
Strength to Weight: Bending, points 22 to 38
49
Thermal Diffusivity, mm2/s 72
88
Thermal Shock Resistance, points 6.1 to 14
13

Alloy Composition

Aluminum (Al), % 96 to 98.5
0
Calcium (Ca), % 0
0 to 0.3
Copper (Cu), % 0 to 0.1
0 to 0.050
Iron (Fe), % 0 to 0.5
0
Magnesium (Mg), % 0.4 to 0.8
97.2 to 98.8
Manganese (Mn), % 0.4 to 0.8
1.2 to 2.0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0.7 to 1.3
0 to 0.1
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0
0 to 0.3