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AZ91C Magnesium vs. C355.0 Aluminum

AZ91C magnesium belongs to the magnesium alloys classification, while C355.0 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is AZ91C magnesium and the bottom bar is C355.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
70
Elongation at Break, % 2.3 to 7.9
2.7 to 3.8
Fatigue Strength, MPa 56 to 85
76 to 84
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
26
Tensile Strength: Ultimate (UTS), MPa 170 to 270
290 to 310
Tensile Strength: Yield (Proof), MPa 83 to 130
200 to 230

Thermal Properties

Latent Heat of Fusion, J/g 350
470
Maximum Temperature: Mechanical, °C 130
170
Melting Completion (Liquidus), °C 600
620
Melting Onset (Solidus), °C 470
570
Solidification (Pattern Maker's) Shrinkage, % 1.3
1.3
Specific Heat Capacity, J/kg-K 990
900
Thermal Conductivity, W/m-K 73
150
Thermal Expansion, µm/m-K 26
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.9 to 12
39
Electrical Conductivity: Equal Weight (Specific), % IACS 52 to 60
130

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.5
Density, g/cm3 1.7
2.7
Embodied Carbon, kg CO2/kg material 22
8.0
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 990
1120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.2 to 16
7.5 to 9.8
Resilience: Unit (Modulus of Resilience), kJ/m3 75 to 180
290 to 380
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
51
Strength to Weight: Axial, points 27 to 43
30 to 32
Strength to Weight: Bending, points 39 to 53
36 to 37
Thermal Diffusivity, mm2/s 43
60
Thermal Shock Resistance, points 9.9 to 16
13 to 14

Alloy Composition


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Aluminum (Al), % 8.1 to 9.3
91.7 to 94.1
Copper (Cu), % 0 to 0.1
1.0 to 1.5
Iron (Fe), % 0
0 to 0.2
Magnesium (Mg), % 88.6 to 91.4
0.4 to 0.6
Manganese (Mn), % 0.13 to 0.35
0 to 0.1
Nickel (Ni), % 0 to 0.010
0
Silicon (Si), % 0 to 0.3
4.5 to 5.5
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0.4 to 1.0
0 to 0.1
Residuals, % 0 to 0.3
0 to 0.15

Comparable Variants