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EN-MC65220 Magnesium vs. S38100 Stainless Steel

EN-MC65220 magnesium belongs to the magnesium alloys classification, while S38100 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 S38100 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
45
Fatigue Strength, MPa 110
210
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
76
Shear Strength, MPa 150
400
Tensile Strength: Ultimate (UTS), MPa 270
580
Tensile Strength: Yield (Proof), MPa 200
230

Thermal Properties

Latent Heat of Fusion, J/g 340
320
Maximum Temperature: Mechanical, °C 160
970
Melting Completion (Liquidus), °C 610
1400
Melting Onset (Solidus), °C 550
1350
Specific Heat Capacity, J/kg-K 980
480
Thermal Conductivity, W/m-K 110
15
Thermal Expansion, µm/m-K 26
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 120
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 80
20
Density, g/cm3 1.9
7.8
Embodied Carbon, kg CO2/kg material 27
3.8
Embodied Energy, MJ/kg 210
54

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.5
210
Resilience: Unit (Modulus of Resilience), kJ/m3 450
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 62
25
Strength to Weight: Axial, points 40
21
Strength to Weight: Bending, points 49
20
Thermal Diffusivity, mm2/s 61
4.0
Thermal Shock Resistance, points 17
13

Alloy Composition


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Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
17 to 19
Copper (Cu), % 0.050 to 0.1
0
Iron (Fe), % 0 to 0.010
57.9 to 64
Magnesium (Mg), % 93.8 to 96.8
0
Manganese (Mn), % 0 to 0.15
0 to 2.0
Nickel (Ni), % 0 to 0.0050
17.5 to 18.5
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.010
1.5 to 2.5
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