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ACI-ASTM CN3MN Steel vs. WE54A Magnesium

ACI-ASTM CN3MN steel belongs to the iron alloys classification, while WE54A magnesium belongs to the magnesium alloys. There are 30 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 CN3MN steel and the bottom bar is WE54A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
85
Elastic (Young's, Tensile) Modulus, GPa 210
44
Elongation at Break, % 39
4.3 to 5.6
Fatigue Strength, MPa 250
98 to 130
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 80
17
Tensile Strength: Ultimate (UTS), MPa 620
270 to 300
Tensile Strength: Yield (Proof), MPa 300
180

Thermal Properties

Latent Heat of Fusion, J/g 310
330
Maximum Temperature: Mechanical, °C 1100
170
Melting Completion (Liquidus), °C 1460
640
Melting Onset (Solidus), °C 1410
570
Specific Heat Capacity, J/kg-K 460
960
Thermal Conductivity, W/m-K 13
52
Thermal Expansion, µm/m-K 16
25

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
10
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
47

Otherwise Unclassified Properties

Base Metal Price, % relative 33
34
Density, g/cm3 8.1
1.9
Embodied Carbon, kg CO2/kg material 6.2
29
Embodied Energy, MJ/kg 84
260
Embodied Water, L/kg 200
900

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
10 to 14
Resilience: Unit (Modulus of Resilience), kJ/m3 210
360 to 380
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
62
Strength to Weight: Axial, points 21
39 to 43
Strength to Weight: Bending, points 20
49 to 51
Thermal Diffusivity, mm2/s 3.4
28
Thermal Shock Resistance, points 14
18 to 19

Alloy Composition

Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 20 to 22
0
Copper (Cu), % 0 to 0.75
0 to 0.030
Iron (Fe), % 41.4 to 50.3
0 to 0.010
Lithium (Li), % 0
0 to 0.2
Magnesium (Mg), % 0
88.7 to 93.4
Manganese (Mn), % 0 to 2.0
0 to 0.030
Molybdenum (Mo), % 6.0 to 7.0
0
Nickel (Ni), % 23.5 to 25.5
0 to 0.0050
Nitrogen (N), % 0.18 to 0.26
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.010
Sulfur (S), % 0 to 0.010
0
Unspecified Rare Earths, % 0
1.5 to 4.0
Yttrium (Y), % 0
4.8 to 5.5
Zinc (Zn), % 0
0 to 0.2
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3