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ACI-ASTM CD3MN Steel vs. AM60B Magnesium

ACI-ASTM CD3MN steel belongs to the iron alloys classification, while AM60B magnesium belongs to the magnesium 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 ACI-ASTM CD3MN steel and the bottom bar is AM60B magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
45
Elongation at Break, % 29
11
Fatigue Strength, MPa 340
96
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
17
Tensile Strength: Ultimate (UTS), MPa 710
230
Tensile Strength: Yield (Proof), MPa 460
130

Thermal Properties

Latent Heat of Fusion, J/g 300
350
Maximum Temperature: Mechanical, °C 1060
120
Melting Completion (Liquidus), °C 1450
620
Melting Onset (Solidus), °C 1400
540
Specific Heat Capacity, J/kg-K 480
1000
Thermal Conductivity, W/m-K 16
61
Thermal Expansion, µm/m-K 13
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
13
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
72

Otherwise Unclassified Properties

Base Metal Price, % relative 18
12
Density, g/cm3 7.8
1.7
Embodied Carbon, kg CO2/kg material 3.6
23
Embodied Energy, MJ/kg 50
160
Embodied Water, L/kg 160
990

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
21
Resilience: Unit (Modulus of Resilience), kJ/m3 530
190
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
71
Strength to Weight: Axial, points 25
38
Strength to Weight: Bending, points 23
50
Thermal Diffusivity, mm2/s 4.3
37
Thermal Shock Resistance, points 20
14

Alloy Composition

Aluminum (Al), % 0
5.5 to 6.5
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 21 to 23.5
0
Copper (Cu), % 0 to 1.0
0 to 0.010
Iron (Fe), % 62.6 to 71.9
0 to 0.0050
Magnesium (Mg), % 0
92.6 to 94.3
Manganese (Mn), % 0 to 1.5
0.24 to 0.6
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 4.5 to 6.5
0 to 0.0020
Nitrogen (N), % 0.1 to 0.3
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.1
Sulfur (S), % 0 to 0.020
0
Zinc (Zn), % 0
0 to 0.22