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EN-MC65220 Magnesium vs. S31727 Stainless Steel

EN-MC65220 magnesium belongs to the magnesium alloys classification, while S31727 stainless steel belongs to the iron alloys. There are 26 material properties with values for both materials. Properties with values for just one material (9, 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-MC65220 magnesium and the bottom bar is S31727 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
190
Elastic (Young's, Tensile) Modulus, GPa 44
200
Elongation at Break, % 2.2
40
Fatigue Strength, MPa 110
240
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
78
Shear Strength, MPa 150
430
Tensile Strength: Ultimate (UTS), MPa 270
630
Tensile Strength: Yield (Proof), MPa 200
270

Thermal Properties

Latent Heat of Fusion, J/g 340
290
Maximum Temperature: Mechanical, °C 160
1010
Melting Completion (Liquidus), °C 610
1440
Melting Onset (Solidus), °C 550
1390
Specific Heat Capacity, J/kg-K 980
470
Thermal Expansion, µm/m-K 26
16

Otherwise Unclassified Properties

Base Metal Price, % relative 80
24
Density, g/cm3 1.9
8.0
Embodied Carbon, kg CO2/kg material 27
4.7
Embodied Energy, MJ/kg 210
64

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.5
200
Resilience: Unit (Modulus of Resilience), kJ/m3 450
190
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 62
24
Strength to Weight: Axial, points 40
22
Strength to Weight: Bending, points 49
20
Thermal Shock Resistance, points 17
14

Alloy Composition


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Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
17.5 to 19
Copper (Cu), % 0.050 to 0.1
2.8 to 4.0
Iron (Fe), % 0 to 0.010
53.7 to 61.3
Magnesium (Mg), % 93.8 to 96.8
0
Manganese (Mn), % 0 to 0.15
0 to 1.0
Molybdenum (Mo), % 0
3.8 to 4.5
Nickel (Ni), % 0 to 0.0050
14.5 to 16.5
Nitrogen (N), % 0
0.15 to 0.21
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.010
0 to 1.0
Silver (Ag), % 1.3 to 1.7
0
Sulfur (S), % 0
0 to 0.030
Unspecified Rare Earths, % 1.5 to 3.0
0
Zinc (Zn), % 0 to 0.2
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0