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AM50A Magnesium vs. S41425 Stainless Steel

AM50A magnesium belongs to the magnesium alloys classification, while S41425 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 AM50A magnesium and the bottom bar is S41425 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 58
280
Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 11
17
Fatigue Strength, MPa 70
450
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
77
Shear Strength, MPa 120
570
Tensile Strength: Ultimate (UTS), MPa 210
920
Tensile Strength: Yield (Proof), MPa 120
750

Thermal Properties

Latent Heat of Fusion, J/g 350
280
Maximum Temperature: Mechanical, °C 120
810
Melting Completion (Liquidus), °C 620
1450
Melting Onset (Solidus), °C 570
1410
Specific Heat Capacity, J/kg-K 1000
470
Thermal Conductivity, W/m-K 65
16
Thermal Expansion, µm/m-K 26
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 16
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 88
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 12
13
Density, g/cm3 1.7
7.9
Embodied Carbon, kg CO2/kg material 23
2.9
Embodied Energy, MJ/kg 160
40
Embodied Water, L/kg 990
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19
150
Resilience: Unit (Modulus of Resilience), kJ/m3 150
1420
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 71
25
Strength to Weight: Axial, points 35
33
Strength to Weight: Bending, points 47
27
Thermal Diffusivity, mm2/s 39
4.4
Thermal Shock Resistance, points 13
33

Alloy Composition

Aluminum (Al), % 4.4 to 5.4
0
Carbon (C), % 0
0 to 0.050
Chromium (Cr), % 0
12 to 15
Copper (Cu), % 0 to 0.010
0 to 0.3
Iron (Fe), % 0 to 0.0040
74 to 81.9
Magnesium (Mg), % 93.7 to 95.3
0
Manganese (Mn), % 0.26 to 0.6
0.5 to 1.0
Molybdenum (Mo), % 0
1.5 to 2.0
Nickel (Ni), % 0 to 0.0020
4.0 to 7.0
Nitrogen (N), % 0
0.060 to 0.12
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.1
0 to 0.5
Sulfur (S), % 0
0 to 0.0050
Zinc (Zn), % 0 to 0.22
0