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ACI-ASTM CN3M Steel vs. AZ92A Magnesium

ACI-ASTM CN3M steel belongs to the iron alloys classification, while AZ92A magnesium belongs to the magnesium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, 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 CN3M steel and the bottom bar is AZ92A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
47
Elongation at Break, % 34
2.1 to 6.8
Fatigue Strength, MPa 150
76 to 90
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 80
18
Tensile Strength: Ultimate (UTS), MPa 500
170 to 270
Tensile Strength: Yield (Proof), MPa 190
83 to 140

Thermal Properties

Latent Heat of Fusion, J/g 310
350
Maximum Temperature: Mechanical, °C 1100
130
Melting Completion (Liquidus), °C 1450
590
Melting Onset (Solidus), °C 1400
440
Specific Heat Capacity, J/kg-K 470
980
Thermal Conductivity, W/m-K 13
44 to 58
Thermal Expansion, µm/m-K 16
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
11 to 12
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
53 to 62

Otherwise Unclassified Properties

Base Metal Price, % relative 31
12
Density, g/cm3 8.1
1.8
Embodied Carbon, kg CO2/kg material 5.9
22
Embodied Energy, MJ/kg 80
160
Embodied Water, L/kg 200
980

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
4.0 to 14
Resilience: Unit (Modulus of Resilience), kJ/m3 89
73 to 220
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
67
Strength to Weight: Axial, points 17
26 to 41
Strength to Weight: Bending, points 17
38 to 51
Thermal Diffusivity, mm2/s 3.4
25 to 33
Thermal Shock Resistance, points 11
10 to 16

Alloy Composition

Aluminum (Al), % 0
8.3 to 9.7
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 20 to 22
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 42.4 to 52.5
0
Magnesium (Mg), % 0
86.7 to 90
Manganese (Mn), % 0 to 2.0
0.1 to 0.35
Molybdenum (Mo), % 4.5 to 5.5
0
Nickel (Ni), % 23 to 27
0 to 0.010
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 1.0
0 to 0.3
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
1.6 to 2.4
Residuals, % 0
0 to 0.3