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EN-MC21210 Magnesium vs. ACI-ASTM CA6NM Steel

EN-MC21210 magnesium belongs to the magnesium alloys classification, while ACI-ASTM CA6NM steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 EN-MC21210 magnesium and the bottom bar is ACI-ASTM CA6NM steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 48
250
Elastic (Young's, Tensile) Modulus, GPa 44
200
Elongation at Break, % 14
17
Fatigue Strength, MPa 70
380
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
76
Tensile Strength: Ultimate (UTS), MPa 190
850
Tensile Strength: Yield (Proof), MPa 90
620

Thermal Properties

Latent Heat of Fusion, J/g 350
280
Maximum Temperature: Mechanical, °C 100
770
Melting Completion (Liquidus), °C 600
1450
Melting Onset (Solidus), °C 570
1400
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 120
25
Thermal Expansion, µm/m-K 27
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 24
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 130
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 12
10
Density, g/cm3 1.6
7.8
Embodied Carbon, kg CO2/kg material 24
2.5
Embodied Energy, MJ/kg 160
34
Embodied Water, L/kg 980
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 22
130
Resilience: Unit (Modulus of Resilience), kJ/m3 92
1000
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 72
25
Strength to Weight: Axial, points 32
30
Strength to Weight: Bending, points 44
26
Thermal Diffusivity, mm2/s 76
6.7
Thermal Shock Resistance, points 11
31

Alloy Composition


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Aluminum (Al), % 1.6 to 2.6
0
Carbon (C), % 0
0 to 0.060
Chromium (Cr), % 0
11.5 to 14
Copper (Cu), % 0 to 0.010
0
Iron (Fe), % 0 to 0.0050
78.4 to 84.6
Magnesium (Mg), % 96.3 to 98.3
0
Manganese (Mn), % 0.1 to 0.7
0 to 1.0
Molybdenum (Mo), % 0
0.4 to 1.0
Nickel (Ni), % 0 to 0.0020
3.5 to 4.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.1
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.010
0