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AISI 422 Stainless Steel vs. AM50A Magnesium

AISI 422 stainless steel belongs to the iron alloys classification, while AM50A magnesium belongs to the magnesium alloys. There are 31 material properties with values for both materials. Properties with values for just one material (4, 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 422 stainless steel and the bottom bar is AM50A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260 to 330
58
Elastic (Young's, Tensile) Modulus, GPa 200
45
Elongation at Break, % 15 to 17
11
Fatigue Strength, MPa 410 to 500
70
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
17
Shear Strength, MPa 560 to 660
120
Tensile Strength: Ultimate (UTS), MPa 910 to 1080
210
Tensile Strength: Yield (Proof), MPa 670 to 870
120

Thermal Properties

Latent Heat of Fusion, J/g 270
350
Maximum Temperature: Mechanical, °C 650
120
Melting Completion (Liquidus), °C 1480
620
Melting Onset (Solidus), °C 1470
570
Specific Heat Capacity, J/kg-K 470
1000
Thermal Conductivity, W/m-K 24
65
Thermal Expansion, µm/m-K 10
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 4.7
16
Electrical Conductivity: Equal Weight (Specific), % IACS 5.3
88

Otherwise Unclassified Properties

Base Metal Price, % relative 11
12
Density, g/cm3 7.9
1.7
Embodied Carbon, kg CO2/kg material 3.1
23
Embodied Energy, MJ/kg 44
160
Embodied Water, L/kg 100
990

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 150
19
Resilience: Unit (Modulus of Resilience), kJ/m3 1140 to 1910
150
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
71
Strength to Weight: Axial, points 32 to 38
35
Strength to Weight: Bending, points 26 to 30
47
Thermal Diffusivity, mm2/s 6.4
39
Thermal Shock Resistance, points 33 to 39
13

Alloy Composition

Aluminum (Al), % 0
4.4 to 5.4
Carbon (C), % 0.2 to 0.25
0
Chromium (Cr), % 11 to 12.5
0
Copper (Cu), % 0
0 to 0.010
Iron (Fe), % 81.9 to 85.8
0 to 0.0040
Magnesium (Mg), % 0
93.7 to 95.3
Manganese (Mn), % 0.5 to 1.0
0.26 to 0.6
Molybdenum (Mo), % 0.9 to 1.3
0
Nickel (Ni), % 0.5 to 1.0
0 to 0.0020
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.5
0 to 0.1
Sulfur (S), % 0 to 0.025
0
Tungsten (W), % 0.9 to 1.3
0
Vanadium (V), % 0.2 to 0.3
0
Zinc (Zn), % 0
0 to 0.22