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EN-MC21320 Magnesium vs. AISI 420 Stainless Steel

EN-MC21320 magnesium belongs to the magnesium alloys classification, while AISI 420 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 AISI 420 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 68
190
Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 7.5
8.0 to 15
Fatigue Strength, MPa 95
220 to 670
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
76
Shear Strength, MPa 130
420 to 1010
Tensile Strength: Ultimate (UTS), MPa 230
690 to 1720
Tensile Strength: Yield (Proof), MPa 140
380 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 370
280
Maximum Temperature: Mechanical, °C 110
620
Melting Completion (Liquidus), °C 600
1510
Melting Onset (Solidus), °C 530
1450
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 66
27
Thermal Expansion, µm/m-K 26
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 91
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 12
7.5
Density, g/cm3 1.6
7.7
Embodied Carbon, kg CO2/kg material 23
2.0
Embodied Energy, MJ/kg 160
28
Embodied Water, L/kg 980
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15
88 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 200
380 to 4410
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 72
25
Strength to Weight: Axial, points 38
25 to 62
Strength to Weight: Bending, points 50
22 to 41
Thermal Diffusivity, mm2/s 40
7.3
Thermal Shock Resistance, points 13
25 to 62

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
0
Carbon (C), % 0
0.15 to 0.4
Chromium (Cr), % 0
12 to 14
Copper (Cu), % 0 to 0.010
0
Iron (Fe), % 0 to 0.0050
82.3 to 87.9
Magnesium (Mg), % 92.5 to 95.9
0
Manganese (Mn), % 0.1 to 0.7
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0 to 0.0020
0 to 0.75
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