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EN-MC21210 Magnesium vs. S15500 Stainless Steel

EN-MC21210 magnesium belongs to the magnesium alloys classification, while S15500 stainless steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (5, 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-MC21210 magnesium and the bottom bar is S15500 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 48
290 to 430
Elastic (Young's, Tensile) Modulus, GPa 44
190
Elongation at Break, % 14
6.8 to 16
Fatigue Strength, MPa 70
350 to 650
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
75
Shear Strength, MPa 110
540 to 870
Tensile Strength: Ultimate (UTS), MPa 190
890 to 1490
Tensile Strength: Yield (Proof), MPa 90
590 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 350
280
Maximum Temperature: Mechanical, °C 100
820
Melting Completion (Liquidus), °C 600
1430
Melting Onset (Solidus), °C 570
1380
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 120
17
Thermal Expansion, µm/m-K 27
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 24
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 130
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 12
13
Density, g/cm3 1.6
7.8
Embodied Carbon, kg CO2/kg material 24
2.7
Embodied Energy, MJ/kg 160
39
Embodied Water, L/kg 980
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 22
98 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 92
890 to 4460
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 72
25
Strength to Weight: Axial, points 32
32 to 53
Strength to Weight: Bending, points 44
26 to 37
Thermal Diffusivity, mm2/s 76
4.6
Thermal Shock Resistance, points 11
30 to 50

Alloy Composition


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Aluminum (Al), % 1.6 to 2.6
0
Carbon (C), % 0
0 to 0.070
Chromium (Cr), % 0
14 to 15.5
Copper (Cu), % 0 to 0.010
2.5 to 4.5
Iron (Fe), % 0 to 0.0050
71.9 to 79.9
Magnesium (Mg), % 96.3 to 98.3
0
Manganese (Mn), % 0.1 to 0.7
0 to 1.0
Nickel (Ni), % 0 to 0.0020
3.5 to 5.5
Niobium (Nb), % 0
0.15 to 0.45
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.1
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.010
0