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EN-MC32110 Magnesium vs. S31277 Stainless Steel

EN-MC32110 magnesium belongs to the magnesium alloys classification, while S31277 stainless steel belongs to the iron alloys. There are 26 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-MC32110 magnesium and the bottom bar is S31277 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 49
210
Elongation at Break, % 2.2
45
Fatigue Strength, MPa 80
380
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 19
80
Shear Strength, MPa 120
600
Tensile Strength: Ultimate (UTS), MPa 220
860
Tensile Strength: Yield (Proof), MPa 140
410

Thermal Properties

Latent Heat of Fusion, J/g 330
310
Maximum Temperature: Mechanical, °C 99
1100
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 500
1410
Specific Heat Capacity, J/kg-K 950
460
Thermal Expansion, µm/m-K 26
16

Otherwise Unclassified Properties

Base Metal Price, % relative 13
36
Density, g/cm3 2.1
8.1
Embodied Carbon, kg CO2/kg material 22
6.7
Embodied Energy, MJ/kg 150
90
Embodied Water, L/kg 920
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.3
320
Resilience: Unit (Modulus of Resilience), kJ/m3 210
410
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 58
24
Strength to Weight: Axial, points 29
29
Strength to Weight: Bending, points 38
25
Thermal Shock Resistance, points 12
19

Alloy Composition


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Aluminum (Al), % 0 to 0.2
0
Carbon (C), % 0
0 to 0.020
Chromium (Cr), % 0
20.5 to 23
Copper (Cu), % 2.4 to 3.0
0.5 to 1.5
Iron (Fe), % 0 to 0.050
35.5 to 46.2
Magnesium (Mg), % 89.3 to 91.9
0
Manganese (Mn), % 0.25 to 0.75
0 to 3.0
Molybdenum (Mo), % 0
6.5 to 8.0
Nickel (Ni), % 0 to 0.010
26 to 28
Nitrogen (N), % 0
0.3 to 0.4
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.2
0 to 0.5
Sulfur (S), % 0
0 to 0.010
Zinc (Zn), % 5.5 to 6.5
0
Residuals, % 0 to 0.010
0