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EN-MC65220 Magnesium vs. ACI-ASTM CG3M Steel

EN-MC65220 magnesium belongs to the magnesium alloys classification, while ACI-ASTM CG3M steel belongs to the iron alloys. There are 29 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-MC65220 magnesium and the bottom bar is ACI-ASTM CG3M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
170
Elastic (Young's, Tensile) Modulus, GPa 44
200
Elongation at Break, % 2.2
28
Fatigue Strength, MPa 110
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
79
Tensile Strength: Ultimate (UTS), MPa 270
580
Tensile Strength: Yield (Proof), MPa 200
270

Thermal Properties

Latent Heat of Fusion, J/g 340
300
Maximum Temperature: Mechanical, °C 160
1020
Melting Completion (Liquidus), °C 610
1450
Melting Onset (Solidus), °C 550
1400
Specific Heat Capacity, J/kg-K 980
470
Thermal Conductivity, W/m-K 110
15
Thermal Expansion, µm/m-K 26
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 120
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 80
20
Density, g/cm3 1.9
7.9
Embodied Carbon, kg CO2/kg material 27
4.1
Embodied Energy, MJ/kg 210
56

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.5
130
Resilience: Unit (Modulus of Resilience), kJ/m3 450
190
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 62
25
Strength to Weight: Axial, points 40
20
Strength to Weight: Bending, points 49
20
Thermal Diffusivity, mm2/s 61
4.1
Thermal Shock Resistance, points 17
13

Alloy Composition


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Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
18 to 21
Copper (Cu), % 0.050 to 0.1
0
Iron (Fe), % 0 to 0.010
58.9 to 70
Magnesium (Mg), % 93.8 to 96.8
0
Manganese (Mn), % 0 to 0.15
0 to 1.5
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 0 to 0.0050
9.0 to 13
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.010
0 to 1.5
Silver (Ag), % 1.3 to 1.7
0
Sulfur (S), % 0
0 to 0.040
Unspecified Rare Earths, % 1.5 to 3.0
0
Zinc (Zn), % 0 to 0.2
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0