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EN-MC35110 Magnesium vs. ACI-ASTM CD3MN Steel

EN-MC35110 magnesium belongs to the magnesium alloys classification, while ACI-ASTM CD3MN 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-MC35110 magnesium and the bottom bar is ACI-ASTM CD3MN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 3.1
29
Fatigue Strength, MPa 110
340
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 18
79
Tensile Strength: Ultimate (UTS), MPa 230
710
Tensile Strength: Yield (Proof), MPa 150
460

Thermal Properties

Latent Heat of Fusion, J/g 330
300
Maximum Temperature: Mechanical, °C 140
1060
Melting Completion (Liquidus), °C 600
1450
Melting Onset (Solidus), °C 520
1400
Specific Heat Capacity, J/kg-K 970
480
Thermal Conductivity, W/m-K 110
16
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 130
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 18
18
Density, g/cm3 1.9
7.8
Embodied Carbon, kg CO2/kg material 24
3.6
Embodied Energy, MJ/kg 170
50
Embodied Water, L/kg 940
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.3
180
Resilience: Unit (Modulus of Resilience), kJ/m3 260
530
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 63
25
Strength to Weight: Axial, points 34
25
Strength to Weight: Bending, points 44
23
Thermal Diffusivity, mm2/s 61
4.3
Thermal Shock Resistance, points 14
20

Alloy Composition


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Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
21 to 23.5
Copper (Cu), % 0 to 0.030
0 to 1.0
Iron (Fe), % 0 to 0.010
62.6 to 71.9
Magnesium (Mg), % 92 to 95.4
0
Manganese (Mn), % 0 to 0.15
0 to 1.5
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0 to 0.0050
4.5 to 6.5
Nitrogen (N), % 0
0.1 to 0.3
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.010
0 to 1.0
Sulfur (S), % 0
0 to 0.020
Unspecified Rare Earths, % 0.75 to 1.8
0
Zinc (Zn), % 3.5 to 5.0
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0