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EN-MC21320 Magnesium vs. Grade TDSiCrV Steel

EN-MC21320 magnesium belongs to the magnesium alloys classification, while grade TDSiCrV steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (7, 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 EN-MC21320 magnesium and the bottom bar is grade TDSiCrV steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 68
630
Elastic (Young's, Tensile) Modulus, GPa 45
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
80
Tensile Strength: Ultimate (UTS), MPa 230
2100

Thermal Properties

Latent Heat of Fusion, J/g 370
270
Maximum Temperature: Mechanical, °C 110
420
Melting Completion (Liquidus), °C 600
1440
Melting Onset (Solidus), °C 530
1400
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 66
47
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 91
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 12
2.3
Density, g/cm3 1.6
7.7
Embodied Carbon, kg CO2/kg material 23
1.9
Embodied Energy, MJ/kg 160
26
Embodied Water, L/kg 980
50

Common Calculations

Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 72
25
Strength to Weight: Axial, points 38
75
Strength to Weight: Bending, points 50
47
Thermal Diffusivity, mm2/s 40
13
Thermal Shock Resistance, points 13
63

Alloy Composition


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Aluminum (Al), % 3.5 to 5.0
0
Carbon (C), % 0
0.5 to 0.7
Chromium (Cr), % 0
0.5 to 1.0
Copper (Cu), % 0 to 0.010
0 to 0.1
Iron (Fe), % 0 to 0.0050
96.1 to 97.8
Magnesium (Mg), % 92.5 to 95.9
0
Manganese (Mn), % 0.1 to 0.7
0.4 to 0.9
Nickel (Ni), % 0 to 0.0020
0
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0.5 to 1.5
1.2 to 1.7
Sulfur (S), % 0
0 to 0.020
Vanadium (V), % 0
0.1 to 0.25
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.010
0