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EN-MC95320 Magnesium vs. AISI 418 Stainless Steel

EN-MC95320 magnesium belongs to the magnesium alloys classification, while AISI 418 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-MC95320 magnesium and the bottom bar is AISI 418 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 83
330
Elastic (Young's, Tensile) Modulus, GPa 44
200
Elongation at Break, % 2.2
17
Fatigue Strength, MPa 110
520
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
77
Shear Strength, MPa 140
680
Tensile Strength: Ultimate (UTS), MPa 250
1100
Tensile Strength: Yield (Proof), MPa 190
850

Thermal Properties

Latent Heat of Fusion, J/g 330
270
Maximum Temperature: Mechanical, °C 180
770
Melting Completion (Liquidus), °C 640
1500
Melting Onset (Solidus), °C 530
1460
Specific Heat Capacity, J/kg-K 960
470
Thermal Conductivity, W/m-K 52
25
Thermal Expansion, µm/m-K 25
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 53
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 34
15
Density, g/cm3 1.9
8.0
Embodied Carbon, kg CO2/kg material 28
2.9
Embodied Energy, MJ/kg 250
41
Embodied Water, L/kg 910
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.1
170
Resilience: Unit (Modulus of Resilience), kJ/m3 420
1830
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 61
24
Strength to Weight: Axial, points 36
38
Strength to Weight: Bending, points 45
29
Thermal Diffusivity, mm2/s 28
6.7
Thermal Shock Resistance, points 16
40

Alloy Composition


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Carbon (C), % 0
0.15 to 0.2
Chromium (Cr), % 0
12 to 14
Copper (Cu), % 0 to 0.030
0
Iron (Fe), % 0 to 0.010
78.5 to 83.6
Lithium (Li), % 0 to 0.2
0
Magnesium (Mg), % 89.7 to 93.5
0
Manganese (Mn), % 0 to 0.15
0 to 0.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0 to 0.0050
1.8 to 2.2
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.010
0 to 0.5
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
2.5 to 3.5
Unspecified Rare Earths, % 2.4 to 4.4
0
Yttrium (Y), % 3.7 to 4.3
0
Zinc (Zn), % 0 to 0.2
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0