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EN-MC95310 Magnesium vs. S21800 Stainless Steel

EN-MC95310 magnesium belongs to the magnesium alloys classification, while S21800 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (8, 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-MC95310 magnesium and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 85
210
Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 2.2
40
Fatigue Strength, MPa 110
330
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
75
Shear Strength, MPa 160
510
Tensile Strength: Ultimate (UTS), MPa 280
740
Tensile Strength: Yield (Proof), MPa 190
390

Thermal Properties

Latent Heat of Fusion, J/g 330
340
Maximum Temperature: Mechanical, °C 170
900
Melting Completion (Liquidus), °C 650
1360
Melting Onset (Solidus), °C 540
1310
Specific Heat Capacity, J/kg-K 960
500
Thermal Expansion, µm/m-K 25
16

Otherwise Unclassified Properties

Base Metal Price, % relative 34
15
Density, g/cm3 1.9
7.5
Embodied Carbon, kg CO2/kg material 29
3.1
Embodied Energy, MJ/kg 260
45
Embodied Water, L/kg 900
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.6
250
Resilience: Unit (Modulus of Resilience), kJ/m3 420
390
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 61
26
Strength to Weight: Axial, points 40
27
Strength to Weight: Bending, points 49
24
Thermal Shock Resistance, points 18
17

Alloy Composition


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Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0
16 to 18
Copper (Cu), % 0 to 0.030
0
Iron (Fe), % 0 to 0.010
59.1 to 65.4
Lithium (Li), % 0 to 0.2
0
Magnesium (Mg), % 88.9 to 93.4
0
Manganese (Mn), % 0 to 0.15
7.0 to 9.0
Nickel (Ni), % 0 to 0.0050
8.0 to 9.0
Nitrogen (N), % 0
0.080 to 0.18
Phosphorus (P), % 0
0 to 0.060
Silicon (Si), % 0 to 0.010
3.5 to 4.5
Sulfur (S), % 0
0 to 0.030
Unspecified Rare Earths, % 1.5 to 4.0
0
Yttrium (Y), % 4.8 to 5.5
0
Zinc (Zn), % 0 to 0.2
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0