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ACI-ASTM CD6MN Steel vs. AM100A Magnesium

ACI-ASTM CD6MN steel belongs to the iron alloys classification, while AM100A 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 CD6MN steel and the bottom bar is AM100A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
46
Elongation at Break, % 28
1.0 to 6.8
Fatigue Strength, MPa 370
48 to 70
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 80
18
Tensile Strength: Ultimate (UTS), MPa 730
160 to 270
Tensile Strength: Yield (Proof), MPa 510
78 to 140

Thermal Properties

Latent Heat of Fusion, J/g 300
350
Maximum Temperature: Mechanical, °C 1100
140
Melting Completion (Liquidus), °C 1440
590
Melting Onset (Solidus), °C 1390
460
Specific Heat Capacity, J/kg-K 480
990
Thermal Conductivity, W/m-K 16
73
Thermal Expansion, µm/m-K 13
25

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
11
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
59

Otherwise Unclassified Properties

Base Metal Price, % relative 17
12
Density, g/cm3 7.7
1.7
Embodied Carbon, kg CO2/kg material 3.4
22
Embodied Energy, MJ/kg 48
160
Embodied Water, L/kg 170
1000

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
1.3 to 15
Resilience: Unit (Modulus of Resilience), kJ/m3 650
66 to 210
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 25
70
Strength to Weight: Axial, points 26
25 to 44
Strength to Weight: Bending, points 23
38 to 54
Thermal Diffusivity, mm2/s 4.4
43
Thermal Shock Resistance, points 20
9.7 to 17

Alloy Composition

Aluminum (Al), % 0
9.3 to 10.7
Carbon (C), % 0 to 0.060
0
Chromium (Cr), % 24 to 27
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 62.1 to 70.1
0
Magnesium (Mg), % 0
87.9 to 90.6
Manganese (Mn), % 0 to 1.0
0.1 to 0.35
Molybdenum (Mo), % 1.8 to 2.5
0
Nickel (Ni), % 4.0 to 6.0
0 to 0.010
Nitrogen (N), % 0.15 to 0.25
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.3
Sulfur (S), % 0 to 0.040
0
Zinc (Zn), % 0
0 to 0.3
Residuals, % 0
0 to 0.3