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AM60A Magnesium vs. ACI-ASTM CN3MN Steel

AM60A magnesium belongs to the magnesium alloys classification, while ACI-ASTM CN3MN steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 AM60A magnesium and the bottom bar is ACI-ASTM CN3MN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 62
180
Elastic (Young's, Tensile) Modulus, GPa 45
210
Elongation at Break, % 8.8
39
Fatigue Strength, MPa 70
250
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
80
Tensile Strength: Ultimate (UTS), MPa 230
620
Tensile Strength: Yield (Proof), MPa 130
300

Thermal Properties

Latent Heat of Fusion, J/g 350
310
Maximum Temperature: Mechanical, °C 120
1100
Melting Completion (Liquidus), °C 620
1460
Melting Onset (Solidus), °C 550
1410
Specific Heat Capacity, J/kg-K 1000
460
Thermal Conductivity, W/m-K 62
13
Thermal Expansion, µm/m-K 26
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 69
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 12
33
Density, g/cm3 1.7
8.1
Embodied Carbon, kg CO2/kg material 23
6.2
Embodied Energy, MJ/kg 160
84
Embodied Water, L/kg 990
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17
200
Resilience: Unit (Modulus of Resilience), kJ/m3 190
210
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 71
24
Strength to Weight: Axial, points 37
21
Strength to Weight: Bending, points 49
20
Thermal Diffusivity, mm2/s 37
3.4
Thermal Shock Resistance, points 14
14

Alloy Composition

Aluminum (Al), % 5.5 to 6.5
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
20 to 22
Copper (Cu), % 0 to 0.35
0 to 0.75
Iron (Fe), % 0
41.4 to 50.3
Magnesium (Mg), % 91.8 to 94.4
0
Manganese (Mn), % 0.13 to 0.6
0 to 2.0
Molybdenum (Mo), % 0
6.0 to 7.0
Nickel (Ni), % 0 to 0.030
23.5 to 25.5
Nitrogen (N), % 0
0.18 to 0.26
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0
0 to 0.010
Zinc (Zn), % 0 to 0.22
0