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AZ80A Magnesium vs. Grade FDC Steel

AZ80A magnesium belongs to the magnesium alloys classification, while grade FDC steel belongs to the iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is AZ80A magnesium and the bottom bar is grade FDC steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
80
Tensile Strength: Ultimate (UTS), MPa 320 to 340
1680

Thermal Properties

Latent Heat of Fusion, J/g 350
250
Maximum Temperature: Mechanical, °C 130
400
Melting Completion (Liquidus), °C 600
1450
Melting Onset (Solidus), °C 490
1410
Specific Heat Capacity, J/kg-K 990
470
Thermal Conductivity, W/m-K 77
51
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 59
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 12
1.9
Density, g/cm3 1.7
7.8
Embodied Carbon, kg CO2/kg material 23
1.4
Embodied Energy, MJ/kg 160
19
Embodied Water, L/kg 990
47

Common Calculations

Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
24
Strength to Weight: Axial, points 51 to 55
60
Strength to Weight: Bending, points 60 to 63
40
Thermal Diffusivity, mm2/s 45
14
Thermal Shock Resistance, points 19 to 20
50

Alloy Composition

Aluminum (Al), % 7.8 to 9.2
0
Carbon (C), % 0
0.6 to 0.75
Chromium (Cr), % 0
0 to 0.3
Copper (Cu), % 0 to 0.050
0 to 0.12
Iron (Fe), % 0 to 0.0050
98 to 99.4
Magnesium (Mg), % 89 to 91.9
0
Manganese (Mn), % 0.12 to 0.5
0.5 to 1.2
Nickel (Ni), % 0 to 0.0050
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.1
0.1 to 0.35
Sulfur (S), % 0
0 to 0.025
Zinc (Zn), % 0.2 to 0.8
0
Residuals, % 0 to 0.3
0