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EN-MC32110 Magnesium vs. SAE-AISI 8620 Steel

EN-MC32110 magnesium belongs to the magnesium alloys classification, while SAE-AISI 8620 steel belongs to the iron alloys. 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 EN-MC32110 magnesium and the bottom bar is SAE-AISI 8620 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 60
150 to 210
Elastic (Young's, Tensile) Modulus, GPa 49
190
Elongation at Break, % 2.2
13 to 31
Fatigue Strength, MPa 80
270 to 360
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 19
73
Shear Strength, MPa 120
340 to 420
Tensile Strength: Ultimate (UTS), MPa 220
520 to 690
Tensile Strength: Yield (Proof), MPa 140
360 to 570

Thermal Properties

Latent Heat of Fusion, J/g 330
250
Maximum Temperature: Mechanical, °C 99
410
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 500
1420
Specific Heat Capacity, J/kg-K 950
470
Thermal Conductivity, W/m-K 120
39
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 32
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 140
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 13
2.6
Density, g/cm3 2.1
7.8
Embodied Carbon, kg CO2/kg material 22
1.5
Embodied Energy, MJ/kg 150
20
Embodied Water, L/kg 920
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.3
86 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 210
340 to 880
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 58
24
Strength to Weight: Axial, points 29
18 to 24
Strength to Weight: Bending, points 38
18 to 22
Thermal Diffusivity, mm2/s 58
10
Thermal Shock Resistance, points 12
15 to 20

Alloy Composition


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Aluminum (Al), % 0 to 0.2
0
Carbon (C), % 0
0.18 to 0.23
Chromium (Cr), % 0
0.4 to 0.6
Copper (Cu), % 2.4 to 3.0
0
Iron (Fe), % 0 to 0.050
96.9 to 98
Magnesium (Mg), % 89.3 to 91.9
0
Manganese (Mn), % 0.25 to 0.75
0.7 to 0.9
Molybdenum (Mo), % 0
0.15 to 0.25
Nickel (Ni), % 0 to 0.010
0.4 to 0.7
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.2
0.15 to 0.35
Sulfur (S), % 0
0 to 0.040
Zinc (Zn), % 5.5 to 6.5
0
Residuals, % 0 to 0.010
0