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ACI-ASTM CN3MN Steel vs. AS41B Magnesium

ACI-ASTM CN3MN steel belongs to the iron alloys classification, while AS41B 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 CN3MN steel and the bottom bar is AS41B magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
45
Elongation at Break, % 39
6.0
Fatigue Strength, MPa 250
97
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 80
18
Tensile Strength: Ultimate (UTS), MPa 620
210
Tensile Strength: Yield (Proof), MPa 300
140

Thermal Properties

Latent Heat of Fusion, J/g 310
370
Maximum Temperature: Mechanical, °C 1100
110
Melting Completion (Liquidus), °C 1460
620
Melting Onset (Solidus), °C 1410
570
Specific Heat Capacity, J/kg-K 460
1000
Thermal Conductivity, W/m-K 13
68
Thermal Expansion, µm/m-K 16
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
17
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
92

Otherwise Unclassified Properties

Base Metal Price, % relative 33
12
Density, g/cm3 8.1
1.7
Embodied Carbon, kg CO2/kg material 6.2
23
Embodied Energy, MJ/kg 84
160
Embodied Water, L/kg 200
980

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
11
Resilience: Unit (Modulus of Resilience), kJ/m3 210
220
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 24
72
Strength to Weight: Axial, points 21
35
Strength to Weight: Bending, points 20
47
Thermal Diffusivity, mm2/s 3.4
41
Thermal Shock Resistance, points 14
13

Alloy Composition

Aluminum (Al), % 0
3.5 to 5.0
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 20 to 22
0
Copper (Cu), % 0 to 0.75
0 to 0.020
Iron (Fe), % 41.4 to 50.3
0 to 0.0035
Magnesium (Mg), % 0
92.7 to 95.7
Manganese (Mn), % 0 to 2.0
0.35 to 0.7
Molybdenum (Mo), % 6.0 to 7.0
0
Nickel (Ni), % 23.5 to 25.5
0 to 0.0020
Nitrogen (N), % 0.18 to 0.26
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0.5 to 1.5
Sulfur (S), % 0 to 0.010
0
Zinc (Zn), % 0
0 to 0.12