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6261 Aluminum vs. AZ31C Magnesium

6261 aluminum belongs to the aluminum alloys classification, while AZ31C magnesium belongs to the magnesium alloys.

For each property being compared, the top bar is 6261 aluminum and the bottom bar is AZ31C magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
45
Elongation at Break, % 9.0 to 16
12
Fatigue Strength, MPa 60 to 120
150
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
17
Shear Strength, MPa 90 to 180
130
Tensile Strength: Ultimate (UTS), MPa 150 to 300
260
Tensile Strength: Yield (Proof), MPa 100 to 260
200

Thermal Properties

Latent Heat of Fusion, J/g 400
350
Maximum Temperature: Mechanical, °C 160
110
Melting Completion (Liquidus), °C 640
600
Melting Onset (Solidus), °C 610
550
Specific Heat Capacity, J/kg-K 900
990
Thermal Conductivity, W/m-K 180
130
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 48
19
Electrical Conductivity: Equal Weight (Specific), % IACS 160
98

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
23
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1180
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 21 to 27
28
Resilience: Unit (Modulus of Resilience), kJ/m3 77 to 500
440
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
70
Strength to Weight: Axial, points 15 to 31
42
Strength to Weight: Bending, points 23 to 37
53
Thermal Diffusivity, mm2/s 75
74
Thermal Shock Resistance, points 6.5 to 13
16

Alloy Composition

Aluminum (Al), % 96.6 to 98.6
2.4 to 3.6
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 0.15 to 0.4
0 to 0.1
Iron (Fe), % 0 to 0.4
0
Magnesium (Mg), % 0.7 to 1.0
93.4 to 97
Manganese (Mn), % 0.2 to 0.35
0.15 to 1.0
Nickel (Ni), % 0
0 to 0.030
Silicon (Si), % 0.4 to 0.7
0 to 0.1
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.2
0.5 to 1.5
Residuals, % 0
0 to 0.3