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ACI-ASTM CD3MN Steel vs. EZ33A Magnesium

ACI-ASTM CD3MN steel belongs to the iron alloys classification, while EZ33A magnesium belongs to the magnesium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (6, 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 ACI-ASTM CD3MN steel and the bottom bar is EZ33A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
44
Elongation at Break, % 29
2.6
Fatigue Strength, MPa 340
70
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
17
Tensile Strength: Ultimate (UTS), MPa 710
150
Tensile Strength: Yield (Proof), MPa 460
100

Thermal Properties

Latent Heat of Fusion, J/g 300
330
Maximum Temperature: Mechanical, °C 1060
250
Melting Completion (Liquidus), °C 1450
640
Melting Onset (Solidus), °C 1400
570
Specific Heat Capacity, J/kg-K 480
970
Thermal Conductivity, W/m-K 16
100
Thermal Expansion, µm/m-K 13
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
24
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
110

Otherwise Unclassified Properties

Base Metal Price, % relative 18
25
Density, g/cm3 7.8
1.9
Embodied Carbon, kg CO2/kg material 3.6
25
Embodied Energy, MJ/kg 50
190
Embodied Water, L/kg 160
930

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
3.6
Resilience: Unit (Modulus of Resilience), kJ/m3 530
120
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
61
Strength to Weight: Axial, points 25
22
Strength to Weight: Bending, points 23
33
Thermal Diffusivity, mm2/s 4.3
54
Thermal Shock Resistance, points 20
9.2

Alloy Composition

Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 21 to 23.5
0
Copper (Cu), % 0 to 1.0
0 to 0.1
Iron (Fe), % 62.6 to 71.9
0
Magnesium (Mg), % 0
91.5 to 95
Manganese (Mn), % 0 to 1.5
0
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 4.5 to 6.5
0 to 0.010
Nitrogen (N), % 0.1 to 0.3
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.020
0
Unspecified Rare Earths, % 0
2.5 to 4.0
Zinc (Zn), % 0
2.0 to 3.1
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3