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EN-MC21210 Magnesium vs. S31266 Stainless Steel

EN-MC21210 magnesium belongs to the magnesium alloys classification, while S31266 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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-MC21210 magnesium and the bottom bar is S31266 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
210
Elongation at Break, % 14
40
Fatigue Strength, MPa 70
400
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
81
Shear Strength, MPa 110
590
Tensile Strength: Ultimate (UTS), MPa 190
860
Tensile Strength: Yield (Proof), MPa 90
470

Thermal Properties

Latent Heat of Fusion, J/g 350
310
Maximum Temperature: Mechanical, °C 100
1100
Melting Completion (Liquidus), °C 600
1470
Melting Onset (Solidus), °C 570
1420
Specific Heat Capacity, J/kg-K 1000
460
Thermal Conductivity, W/m-K 120
12
Thermal Expansion, µm/m-K 27
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 24
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 130
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 12
37
Density, g/cm3 1.6
8.2
Embodied Carbon, kg CO2/kg material 24
6.5
Embodied Energy, MJ/kg 160
89
Embodied Water, L/kg 980
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 22
290
Resilience: Unit (Modulus of Resilience), kJ/m3 92
540
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 72
24
Strength to Weight: Axial, points 32
29
Strength to Weight: Bending, points 44
24
Thermal Diffusivity, mm2/s 76
3.1
Thermal Shock Resistance, points 11
18

Alloy Composition

Aluminum (Al), % 1.6 to 2.6
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
23 to 25
Copper (Cu), % 0 to 0.010
1.0 to 2.5
Iron (Fe), % 0 to 0.0050
34.1 to 46
Magnesium (Mg), % 96.3 to 98.3
0
Manganese (Mn), % 0.1 to 0.7
2.0 to 4.0
Molybdenum (Mo), % 0
5.2 to 6.2
Nickel (Ni), % 0 to 0.0020
21 to 24
Nitrogen (N), % 0
0.35 to 0.6
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.1
0 to 1.0
Sulfur (S), % 0
0 to 0.020
Tungsten (W), % 0
1.5 to 2.5
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.010
0