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AISI 446 Stainless Steel vs. EN-MC21110 Magnesium

AISI 446 stainless steel belongs to the iron alloys classification, while EN-MC21110 magnesium belongs to the magnesium 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 AISI 446 stainless steel and the bottom bar is EN-MC21110 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
58 to 63
Elastic (Young's, Tensile) Modulus, GPa 200
46
Elongation at Break, % 23
2.8 to 6.7
Fatigue Strength, MPa 200
75 to 78
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
18
Shear Strength, MPa 360
120 to 160
Tensile Strength: Ultimate (UTS), MPa 570
200 to 270
Tensile Strength: Yield (Proof), MPa 300
100 to 120

Thermal Properties

Latent Heat of Fusion, J/g 290
350
Maximum Temperature: Mechanical, °C 1180
130
Melting Completion (Liquidus), °C 1510
600
Melting Onset (Solidus), °C 1430
500
Specific Heat Capacity, J/kg-K 490
990
Thermal Conductivity, W/m-K 17
80
Thermal Expansion, µm/m-K 11
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
12
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
61

Otherwise Unclassified Properties

Base Metal Price, % relative 12
12
Density, g/cm3 7.7
1.7
Embodied Carbon, kg CO2/kg material 2.4
23
Embodied Energy, MJ/kg 35
160
Embodied Water, L/kg 150
990

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
4.9 to 14
Resilience: Unit (Modulus of Resilience), kJ/m3 230
120 to 150
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 26
69
Strength to Weight: Axial, points 21
33 to 44
Strength to Weight: Bending, points 20
45 to 54
Thermal Diffusivity, mm2/s 4.6
47
Thermal Shock Resistance, points 19
12 to 16

Alloy Composition

Aluminum (Al), % 0
7.0 to 8.7
Carbon (C), % 0 to 0.2
0
Chromium (Cr), % 23 to 27
0
Copper (Cu), % 0
0 to 0.030
Iron (Fe), % 69.2 to 77
0 to 0.0050
Magnesium (Mg), % 0
89.6 to 92.6
Manganese (Mn), % 0 to 1.5
0.1 to 0.35
Nickel (Ni), % 0 to 0.75
0 to 0.0020
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.2
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
0.35 to 1.0
Residuals, % 0
0 to 0.010