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ACI-ASTM CC50 Steel vs. M1A Magnesium

ACI-ASTM CC50 steel belongs to the iron alloys classification, while M1A magnesium belongs to the magnesium alloys. There are 24 material properties with values for both materials. Properties with values for just one material (9, 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 CC50 steel and the bottom bar is M1A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
45
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 80
18
Tensile Strength: Ultimate (UTS), MPa 430
230

Thermal Properties

Latent Heat of Fusion, J/g 300
350
Maximum Temperature: Mechanical, °C 1100
95
Melting Completion (Liquidus), °C 1420
610
Melting Onset (Solidus), °C 1370
580
Specific Heat Capacity, J/kg-K 490
990
Thermal Conductivity, W/m-K 17
150
Thermal Expansion, µm/m-K 11
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
35
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
190

Otherwise Unclassified Properties

Base Metal Price, % relative 14
12
Density, g/cm3 7.6
1.7
Embodied Carbon, kg CO2/kg material 2.7
24
Embodied Energy, MJ/kg 39
160
Embodied Water, L/kg 170
970

Common Calculations

Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 26
71
Strength to Weight: Axial, points 16
38
Strength to Weight: Bending, points 17
49
Thermal Diffusivity, mm2/s 4.5
88
Thermal Shock Resistance, points 14
13

Alloy Composition

Calcium (Ca), % 0
0 to 0.3
Carbon (C), % 0 to 0.5
0
Chromium (Cr), % 26 to 30
0
Copper (Cu), % 0
0 to 0.050
Iron (Fe), % 62.9 to 74
0
Magnesium (Mg), % 0
97.2 to 98.8
Manganese (Mn), % 0 to 1.0
1.2 to 2.0
Nickel (Ni), % 0 to 4.0
0 to 0.010
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.5
0 to 0.1
Sulfur (S), % 0 to 0.040
0
Residuals, % 0
0 to 0.3