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ISO-WD43150 Magnesium vs. S44635 Stainless Steel

ISO-WD43150 magnesium belongs to the magnesium alloys classification, while S44635 stainless steel belongs to the iron alloys. There are 30 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 ISO-WD43150 magnesium and the bottom bar is S44635 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
210
Elongation at Break, % 2.8
23
Fatigue Strength, MPa 100
390
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 18
81
Shear Strength, MPa 140
450
Tensile Strength: Ultimate (UTS), MPa 250
710
Tensile Strength: Yield (Proof), MPa 150
580

Thermal Properties

Latent Heat of Fusion, J/g 350
300
Maximum Temperature: Mechanical, °C 95
1100
Melting Completion (Liquidus), °C 610
1460
Melting Onset (Solidus), °C 590
1420
Specific Heat Capacity, J/kg-K 990
470
Thermal Conductivity, W/m-K 140
16
Thermal Expansion, µm/m-K 27
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 170
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 12
22
Density, g/cm3 1.7
7.8
Embodied Carbon, kg CO2/kg material 24
4.4
Embodied Energy, MJ/kg 160
62
Embodied Water, L/kg 970
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.1
150
Resilience: Unit (Modulus of Resilience), kJ/m3 250
810
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 71
25
Strength to Weight: Axial, points 41
25
Strength to Weight: Bending, points 52
23
Thermal Diffusivity, mm2/s 81
4.4
Thermal Shock Resistance, points 14
23

Alloy Composition

Carbon (C), % 0
0 to 0.025
Chromium (Cr), % 0
24.5 to 26
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0
61.5 to 68.5
Magnesium (Mg), % 97.5 to 98.8
0
Manganese (Mn), % 1.2 to 2.0
0 to 1.0
Molybdenum (Mo), % 0
3.5 to 4.5
Nickel (Ni), % 0 to 0.010
3.5 to 4.5
Niobium (Nb), % 0
0.2 to 0.8
Nitrogen (N), % 0
0 to 0.035
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.1
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0
0.2 to 0.8
Residuals, % 0 to 0.3
0