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EN-MC65220 Magnesium vs. S31100 Stainless Steel

EN-MC65220 magnesium belongs to the magnesium alloys classification, while S31100 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-MC65220 magnesium and the bottom bar is S31100 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
270
Elastic (Young's, Tensile) Modulus, GPa 44
200
Elongation at Break, % 2.2
4.5
Fatigue Strength, MPa 110
330
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 17
79
Shear Strength, MPa 150
580
Tensile Strength: Ultimate (UTS), MPa 270
1000
Tensile Strength: Yield (Proof), MPa 200
710

Thermal Properties

Latent Heat of Fusion, J/g 340
300
Maximum Temperature: Mechanical, °C 160
1100
Melting Completion (Liquidus), °C 610
1420
Melting Onset (Solidus), °C 550
1380
Specific Heat Capacity, J/kg-K 980
480
Thermal Conductivity, W/m-K 110
16
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 120
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 80
16
Density, g/cm3 1.9
7.7
Embodied Carbon, kg CO2/kg material 27
3.1
Embodied Energy, MJ/kg 210
44

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.5
40
Resilience: Unit (Modulus of Resilience), kJ/m3 450
1240
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 62
25
Strength to Weight: Axial, points 40
36
Strength to Weight: Bending, points 49
29
Thermal Diffusivity, mm2/s 61
4.2
Thermal Shock Resistance, points 17
28

Alloy Composition


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Carbon (C), % 0
0 to 0.060
Chromium (Cr), % 0
25 to 27
Copper (Cu), % 0.050 to 0.1
0
Iron (Fe), % 0 to 0.010
63.6 to 69
Magnesium (Mg), % 93.8 to 96.8
0
Manganese (Mn), % 0 to 0.15
0 to 1.0
Nickel (Ni), % 0 to 0.0050
6.0 to 7.0
Phosphorus (P), % 0
0 to 0.045
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
Titanium (Ti), % 0
0 to 0.25
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