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AM100A Magnesium vs. S41425 Stainless Steel

AM100A magnesium belongs to the magnesium alloys classification, while S41425 stainless steel belongs to the iron alloys. There are 30 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 AM100A magnesium and the bottom bar is S41425 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
200
Elongation at Break, % 1.0 to 6.8
17
Fatigue Strength, MPa 48 to 70
450
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
77
Shear Strength, MPa 90 to 150
570
Tensile Strength: Ultimate (UTS), MPa 160 to 270
920
Tensile Strength: Yield (Proof), MPa 78 to 140
750

Thermal Properties

Latent Heat of Fusion, J/g 350
280
Maximum Temperature: Mechanical, °C 140
810
Melting Completion (Liquidus), °C 590
1450
Melting Onset (Solidus), °C 460
1410
Specific Heat Capacity, J/kg-K 990
470
Thermal Conductivity, W/m-K 73
16
Thermal Expansion, µm/m-K 25
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 59
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 12
13
Density, g/cm3 1.7
7.9
Embodied Carbon, kg CO2/kg material 22
2.9
Embodied Energy, MJ/kg 160
40
Embodied Water, L/kg 1000
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 1.3 to 15
150
Resilience: Unit (Modulus of Resilience), kJ/m3 66 to 210
1420
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 70
25
Strength to Weight: Axial, points 25 to 44
33
Strength to Weight: Bending, points 38 to 54
27
Thermal Diffusivity, mm2/s 43
4.4
Thermal Shock Resistance, points 9.7 to 17
33

Alloy Composition

Aluminum (Al), % 9.3 to 10.7
0
Carbon (C), % 0
0 to 0.050
Chromium (Cr), % 0
12 to 15
Copper (Cu), % 0 to 0.1
0 to 0.3
Iron (Fe), % 0
74 to 81.9
Magnesium (Mg), % 87.9 to 90.6
0
Manganese (Mn), % 0.1 to 0.35
0.5 to 1.0
Molybdenum (Mo), % 0
1.5 to 2.0
Nickel (Ni), % 0 to 0.010
4.0 to 7.0
Nitrogen (N), % 0
0.060 to 0.12
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.3
0 to 0.5
Sulfur (S), % 0
0 to 0.0050
Zinc (Zn), % 0 to 0.3
0
Residuals, % 0 to 0.3
0