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AZ61A Magnesium vs. SAE-AISI M50 Steel

AZ61A magnesium belongs to the magnesium alloys classification, while SAE-AISI M50 steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (9, 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 AZ61A magnesium and the bottom bar is SAE-AISI M50 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
75
Tensile Strength: Ultimate (UTS), MPa 280
720 to 2250

Thermal Properties

Latent Heat of Fusion, J/g 350
260
Melting Completion (Liquidus), °C 600
1480
Melting Onset (Solidus), °C 530
1440
Specific Heat Capacity, J/kg-K 990
470
Thermal Conductivity, W/m-K 79
35
Thermal Expansion, µm/m-K 27
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
8.7
Electrical Conductivity: Equal Weight (Specific), % IACS 62
10

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.0
Density, g/cm3 1.7
7.9
Embodied Carbon, kg CO2/kg material 23
5.1
Embodied Energy, MJ/kg 160
74
Embodied Water, L/kg 980
83

Common Calculations

Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
25
Strength to Weight: Axial, points 46
26 to 80
Strength to Weight: Bending, points 56
23 to 49
Thermal Diffusivity, mm2/s 47
9.7
Thermal Shock Resistance, points 17
21 to 66

Alloy Composition


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Aluminum (Al), % 5.5 to 7.2
0
Carbon (C), % 0
0.78 to 0.88
Chromium (Cr), % 0
3.8 to 4.5
Copper (Cu), % 0 to 0.050
0 to 0.25
Iron (Fe), % 0 to 0.0050
87 to 90.4
Magnesium (Mg), % 90.3 to 93.9
0
Manganese (Mn), % 0.15 to 0.5
0.15 to 0.45
Molybdenum (Mo), % 0
3.9 to 4.8
Nickel (Ni), % 0 to 0.0050
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.1
0.2 to 0.6
Sulfur (S), % 0
0 to 0.030
Vanadium (V), % 0
0.8 to 1.3
Zinc (Zn), % 0.4 to 1.5
0
Residuals, % 0 to 0.3
0