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EN-MC21320 Magnesium vs. S33550 Stainless Steel

EN-MC21320 magnesium belongs to the magnesium alloys classification, while S33550 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-MC21320 magnesium and the bottom bar is S33550 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 68
190
Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 7.5
40
Fatigue Strength, MPa 95
270
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 18
79
Shear Strength, MPa 130
470
Tensile Strength: Ultimate (UTS), MPa 230
680
Tensile Strength: Yield (Proof), MPa 140
310

Thermal Properties

Latent Heat of Fusion, J/g 370
300
Maximum Temperature: Mechanical, °C 110
1100
Melting Completion (Liquidus), °C 600
1400
Melting Onset (Solidus), °C 530
1360
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 66
15
Thermal Expansion, µm/m-K 26
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 91
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 12
24
Density, g/cm3 1.6
7.8
Embodied Carbon, kg CO2/kg material 23
4.3
Embodied Energy, MJ/kg 160
61
Embodied Water, L/kg 980
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15
220
Resilience: Unit (Modulus of Resilience), kJ/m3 200
250
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 72
25
Strength to Weight: Axial, points 38
24
Strength to Weight: Bending, points 50
22
Thermal Diffusivity, mm2/s 40
3.9
Thermal Shock Resistance, points 13
15

Alloy Composition


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Aluminum (Al), % 3.5 to 5.0
0
Carbon (C), % 0
0.040 to 0.1
Cerium (Ce), % 0
0.025 to 0.070
Chromium (Cr), % 0
25 to 28
Copper (Cu), % 0 to 0.010
0
Iron (Fe), % 0 to 0.0050
48.8 to 58.2
Lanthanum (La), % 0
0.025 to 0.070
Magnesium (Mg), % 92.5 to 95.9
0
Manganese (Mn), % 0.1 to 0.7
0 to 1.5
Nickel (Ni), % 0 to 0.0020
16.5 to 20
Niobium (Nb), % 0
0.050 to 0.15
Nitrogen (N), % 0
0.18 to 0.25
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.5 to 1.5
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.010
0