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ACI-ASTM CA6N Steel vs. ISO-WD21150 Magnesium

ACI-ASTM CA6N steel belongs to the iron alloys classification, while ISO-WD21150 magnesium belongs to the magnesium alloys. There are 28 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 CA6N steel and the bottom bar is ISO-WD21150 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
45
Elongation at Break, % 17
5.7 to 11
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
17
Tensile Strength: Ultimate (UTS), MPa 1080
240 to 290
Tensile Strength: Yield (Proof), MPa 1060
120 to 200

Thermal Properties

Latent Heat of Fusion, J/g 280
350
Maximum Temperature: Mechanical, °C 740
110
Melting Completion (Liquidus), °C 1440
600
Melting Onset (Solidus), °C 1400
550
Specific Heat Capacity, J/kg-K 480
990
Thermal Conductivity, W/m-K 23
100
Thermal Expansion, µm/m-K 9.9
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
19
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
100

Otherwise Unclassified Properties

Base Metal Price, % relative 11
12
Density, g/cm3 7.8
1.7
Embodied Carbon, kg CO2/kg material 2.5
23
Embodied Energy, MJ/kg 35
160
Embodied Water, L/kg 110
980

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
15 to 24
Resilience: Unit (Modulus of Resilience), kJ/m3 2900
160 to 460
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
70
Strength to Weight: Axial, points 38
40 to 48
Strength to Weight: Bending, points 30
52 to 58
Thermal Diffusivity, mm2/s 6.1
60
Thermal Shock Resistance, points 40
15 to 17

Alloy Composition

Aluminum (Al), % 0
2.4 to 3.6
Carbon (C), % 0 to 0.060
0
Chromium (Cr), % 10.5 to 12.5
0
Copper (Cu), % 0
0 to 0.050
Iron (Fe), % 77.9 to 83.5
0 to 0.0050
Magnesium (Mg), % 0
94 to 97
Manganese (Mn), % 0 to 0.5
0.15 to 0.4
Nickel (Ni), % 6.0 to 8.0
0 to 0.0050
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 1.0
0 to 0.1
Sulfur (S), % 0 to 0.020
0
Zinc (Zn), % 0
0.5 to 1.5
Residuals, % 0
0 to 0.3