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AM50A Magnesium vs. AISI 422 Stainless Steel

AM50A magnesium belongs to the magnesium alloys classification, while AISI 422 stainless steel belongs to the iron 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 AM50A magnesium and the bottom bar is AISI 422 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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