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EN-MC32110 Magnesium vs. S20431 Stainless Steel

EN-MC32110 magnesium belongs to the magnesium alloys classification, while S20431 stainless steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (3, 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 S20431 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 60
210
Elastic (Young's, Tensile) Modulus, GPa 49
200
Elongation at Break, % 2.2
46
Fatigue Strength, MPa 80
320
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 19
76
Shear Strength, MPa 120
500
Tensile Strength: Ultimate (UTS), MPa 220
710
Tensile Strength: Yield (Proof), MPa 140
350

Thermal Properties

Latent Heat of Fusion, J/g 330
280
Maximum Temperature: Mechanical, °C 99
890
Melting Completion (Liquidus), °C 600
1400
Melting Onset (Solidus), °C 500
1360
Specific Heat Capacity, J/kg-K 950
480
Thermal Conductivity, W/m-K 120
15
Thermal Expansion, µm/m-K 26
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 32
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 140
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 13
12
Density, g/cm3 2.1
7.7
Embodied Carbon, kg CO2/kg material 22
2.5
Embodied Energy, MJ/kg 150
36
Embodied Water, L/kg 920
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.3
270
Resilience: Unit (Modulus of Resilience), kJ/m3 210
310
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 58
25
Strength to Weight: Axial, points 29
25
Strength to Weight: Bending, points 38
23
Thermal Diffusivity, mm2/s 58
4.0
Thermal Shock Resistance, points 12
15

Alloy Composition


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Aluminum (Al), % 0 to 0.2
0
Carbon (C), % 0
0 to 0.12
Chromium (Cr), % 0
17 to 18
Copper (Cu), % 2.4 to 3.0
1.5 to 3.5
Iron (Fe), % 0 to 0.050
66.1 to 74.4
Magnesium (Mg), % 89.3 to 91.9
0
Manganese (Mn), % 0.25 to 0.75
5.0 to 7.0
Nickel (Ni), % 0 to 0.010
2.0 to 4.0
Nitrogen (N), % 0
0.1 to 0.25
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.2
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 5.5 to 6.5
0
Residuals, % 0 to 0.010
0