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SAE-AISI T5 Steel vs. ZK40A Magnesium

SAE-AISI T5 steel belongs to the iron alloys classification, while ZK40A magnesium belongs to the magnesium alloys. There are 21 material properties with values for both materials. Properties with values for just one material (10, 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 SAE-AISI T5 steel and the bottom bar is ZK40A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
45
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 80
17
Tensile Strength: Ultimate (UTS), MPa 860 to 2140
280

Thermal Properties

Latent Heat of Fusion, J/g 250
340
Melting Completion (Liquidus), °C 1810
600
Melting Onset (Solidus), °C 1750
540
Specific Heat Capacity, J/kg-K 410
970
Thermal Conductivity, W/m-K 21
110
Thermal Expansion, µm/m-K 11
26

Otherwise Unclassified Properties

Base Metal Price, % relative 60
13
Density, g/cm3 9.4
1.8
Embodied Carbon, kg CO2/kg material 11
24
Embodied Energy, MJ/kg 170
160
Embodied Water, L/kg 140
950

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 21
65
Strength to Weight: Axial, points 25 to 63
43
Strength to Weight: Bending, points 21 to 39
53
Thermal Diffusivity, mm2/s 5.5
62
Thermal Shock Resistance, points 26 to 66
17

Alloy Composition

Carbon (C), % 0.75 to 0.85
0
Chromium (Cr), % 3.8 to 5.0
0
Cobalt (Co), % 7.0 to 9.5
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 60.6 to 68.3
0
Magnesium (Mg), % 0
94.2 to 96.1
Manganese (Mn), % 0.2 to 0.4
0
Molybdenum (Mo), % 0.5 to 1.3
0
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.2 to 0.4
0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 17.5 to 19
0
Vanadium (V), % 1.8 to 2.4
0
Zinc (Zn), % 0
3.5 to 4.5
Zirconium (Zr), % 0
0.45 to 1.0
Residuals, % 0
0 to 0.3