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EN-MC21210 Magnesium vs. AISI 442 Stainless Steel

EN-MC21210 magnesium belongs to the magnesium alloys classification, while AISI 442 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-MC21210 magnesium and the bottom bar is AISI 442 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 48
190
Elastic (Young's, Tensile) Modulus, GPa 44
200
Elongation at Break, % 14
23
Fatigue Strength, MPa 70
210
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 17
78
Shear Strength, MPa 110
370
Tensile Strength: Ultimate (UTS), MPa 190
580
Tensile Strength: Yield (Proof), MPa 90
310

Thermal Properties

Latent Heat of Fusion, J/g 350
290
Maximum Temperature: Mechanical, °C 100
960
Melting Completion (Liquidus), °C 600
1430
Melting Onset (Solidus), °C 570
1390
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 120
22
Thermal Expansion, µm/m-K 27
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 24
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 130
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 12
10
Density, g/cm3 1.6
7.7
Embodied Carbon, kg CO2/kg material 24
2.3
Embodied Energy, MJ/kg 160
32
Embodied Water, L/kg 980
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 22
110
Resilience: Unit (Modulus of Resilience), kJ/m3 92
250
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 72
25
Strength to Weight: Axial, points 32
21
Strength to Weight: Bending, points 44
20
Thermal Diffusivity, mm2/s 76
5.8
Thermal Shock Resistance, points 11
20

Alloy Composition


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Aluminum (Al), % 1.6 to 2.6
0
Carbon (C), % 0
0 to 0.2
Chromium (Cr), % 0
18 to 23
Copper (Cu), % 0 to 0.010
0
Iron (Fe), % 0 to 0.0050
74.1 to 82
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
0 to 0.6
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.1
0 to 1.0
Sulfur (S), % 0
0 to 0.040
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.010
0