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ISO-WD32250 Magnesium vs. ACI-ASTM CA6N Steel

ISO-WD32250 magnesium belongs to the magnesium alloys classification, while ACI-ASTM CA6N steel belongs to the iron 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 ISO-WD32250 magnesium and the bottom bar is ACI-ASTM CA6N steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 4.5 to 8.6
17
Fatigue Strength, MPa 170 to 210
640
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
75
Tensile Strength: Ultimate (UTS), MPa 310 to 330
1080
Tensile Strength: Yield (Proof), MPa 240 to 290
1060

Thermal Properties

Latent Heat of Fusion, J/g 340
280
Maximum Temperature: Mechanical, °C 120
740
Melting Completion (Liquidus), °C 600
1440
Melting Onset (Solidus), °C 550
1400
Specific Heat Capacity, J/kg-K 980
480
Thermal Conductivity, W/m-K 130
23
Thermal Expansion, µm/m-K 26
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 130
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 13
11
Density, g/cm3 1.8
7.8
Embodied Carbon, kg CO2/kg material 24
2.5
Embodied Energy, MJ/kg 160
35
Embodied Water, L/kg 950
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 14 to 26
180
Resilience: Unit (Modulus of Resilience), kJ/m3 630 to 930
2900
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 67
25
Strength to Weight: Axial, points 49 to 51
38
Strength to Weight: Bending, points 58 to 60
30
Thermal Diffusivity, mm2/s 72
6.1
Thermal Shock Resistance, points 19 to 20
40

Alloy Composition


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Carbon (C), % 0
0 to 0.060
Chromium (Cr), % 0
10.5 to 12.5
Iron (Fe), % 0
77.9 to 83.5
Magnesium (Mg), % 94.9 to 97.1
0
Manganese (Mn), % 0
0 to 0.5
Nickel (Ni), % 0
6.0 to 8.0
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.020
Zinc (Zn), % 2.5 to 4.0
0
Zirconium (Zr), % 0.45 to 0.8
0
Residuals, % 0 to 0.3
0