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AZ31C Magnesium vs. SAE-AISI H13 Steel

AZ31C magnesium belongs to the magnesium alloys classification, while SAE-AISI H13 steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (8, 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 AZ31C magnesium and the bottom bar is SAE-AISI H13 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
74
Tensile Strength: Ultimate (UTS), MPa 260
690 to 1820

Thermal Properties

Latent Heat of Fusion, J/g 350
270
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 550
1420
Specific Heat Capacity, J/kg-K 990
470
Thermal Conductivity, W/m-K 130
29
Thermal Expansion, µm/m-K 26
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 19
8.3
Electrical Conductivity: Equal Weight (Specific), % IACS 98
9.7

Otherwise Unclassified Properties

Base Metal Price, % relative 12
6.0
Density, g/cm3 1.7
7.8
Embodied Carbon, kg CO2/kg material 23
4.3
Embodied Energy, MJ/kg 160
64
Embodied Water, L/kg 970
78

Common Calculations

Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 70
25
Strength to Weight: Axial, points 42
25 to 65
Strength to Weight: Bending, points 53
22 to 43
Thermal Diffusivity, mm2/s 74
7.8
Thermal Shock Resistance, points 16
25 to 65

Alloy Composition

Aluminum (Al), % 2.4 to 3.6
0
Carbon (C), % 0
0.32 to 0.45
Chromium (Cr), % 0
4.8 to 5.5
Copper (Cu), % 0 to 0.1
0 to 0.25
Iron (Fe), % 0
88.8 to 92
Magnesium (Mg), % 93.4 to 97
0
Manganese (Mn), % 0.15 to 1.0
0.2 to 0.5
Molybdenum (Mo), % 0
1.1 to 1.8
Nickel (Ni), % 0 to 0.030
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.1
0.8 to 1.2
Sulfur (S), % 0
0 to 0.030
Vanadium (V), % 0
0.8 to 1.2
Zinc (Zn), % 0.5 to 1.5
0
Residuals, % 0 to 0.3
0