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Grade TDSiCrV Steel vs. ISO-WD21150 Magnesium

Grade TDSiCrV steel belongs to the iron alloys classification, while ISO-WD21150 magnesium belongs to the magnesium alloys. There are 24 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 grade TDSiCrV steel and the bottom bar is ISO-WD21150 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
45
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 80
17
Tensile Strength: Ultimate (UTS), MPa 2100
240 to 290

Thermal Properties

Latent Heat of Fusion, J/g 270
350
Maximum Temperature: Mechanical, °C 420
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 47
100
Thermal Expansion, µm/m-K 13
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
19
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
100

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
12
Density, g/cm3 7.7
1.7
Embodied Carbon, kg CO2/kg material 1.9
23
Embodied Energy, MJ/kg 26
160
Embodied Water, L/kg 50
980

Common Calculations

Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 25
70
Strength to Weight: Axial, points 75
40 to 48
Strength to Weight: Bending, points 47
52 to 58
Thermal Diffusivity, mm2/s 13
60
Thermal Shock Resistance, points 63
15 to 17

Alloy Composition

Aluminum (Al), % 0
2.4 to 3.6
Carbon (C), % 0.5 to 0.7
0
Chromium (Cr), % 0.5 to 1.0
0
Copper (Cu), % 0 to 0.1
0 to 0.050
Iron (Fe), % 96.1 to 97.8
0 to 0.0050
Magnesium (Mg), % 0
94 to 97
Manganese (Mn), % 0.4 to 0.9
0.15 to 0.4
Nickel (Ni), % 0
0 to 0.0050
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 1.2 to 1.7
0 to 0.1
Sulfur (S), % 0 to 0.020
0
Vanadium (V), % 0.1 to 0.25
0
Zinc (Zn), % 0
0.5 to 1.5
Residuals, % 0
0 to 0.3