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AZ80A Magnesium vs. AWS E120C-K4

AZ80A magnesium belongs to the magnesium alloys classification, while AWS E120C-K4 belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (3, 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 AWS E120C-K4.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
190
Elongation at Break, % 3.9 to 8.5
17
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
73
Tensile Strength: Ultimate (UTS), MPa 320 to 340
950
Tensile Strength: Yield (Proof), MPa 210 to 230
840

Thermal Properties

Latent Heat of Fusion, J/g 350
250
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 490
1410
Specific Heat Capacity, J/kg-K 990
470
Thermal Conductivity, W/m-K 77
41
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 59
9.2

Otherwise Unclassified Properties

Base Metal Price, % relative 12
3.5
Density, g/cm3 1.7
7.8
Embodied Carbon, kg CO2/kg material 23
1.7
Embodied Energy, MJ/kg 160
23
Embodied Water, L/kg 990
54

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12 to 24
160
Resilience: Unit (Modulus of Resilience), kJ/m3 500 to 600
1880
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
24
Strength to Weight: Axial, points 51 to 55
34
Strength to Weight: Bending, points 60 to 63
27
Thermal Diffusivity, mm2/s 45
11
Thermal Shock Resistance, points 19 to 20
28

Alloy Composition

Aluminum (Al), % 7.8 to 9.2
0
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0
0.15 to 0.65
Copper (Cu), % 0 to 0.050
0 to 0.35
Iron (Fe), % 0 to 0.0050
92.1 to 98.4
Magnesium (Mg), % 89 to 91.9
0
Manganese (Mn), % 0.12 to 0.5
0.75 to 2.3
Molybdenum (Mo), % 0
0.25 to 0.65
Nickel (Ni), % 0 to 0.0050
0.5 to 2.5
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.1
0 to 0.8
Sulfur (S), % 0
0 to 0.025
Vanadium (V), % 0
0 to 0.030
Zinc (Zn), % 0.2 to 0.8
0
Residuals, % 0
0 to 0.5