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EN 1.4729 Stainless Steel vs. ISO-WD32250 Magnesium

EN 1.4729 stainless steel belongs to the iron alloys classification, while ISO-WD32250 magnesium belongs to the magnesium alloys. There are 21 material properties with values for both materials. Properties with values for just one material (12, 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 EN 1.4729 stainless steel and the bottom bar is ISO-WD32250 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
45
Elongation at Break, % 15
4.5 to 8.6
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
17

Thermal Properties

Latent Heat of Fusion, J/g 300
340
Maximum Temperature: Mechanical, °C 850
120
Melting Completion (Liquidus), °C 1420
600
Melting Onset (Solidus), °C 1380
550
Specific Heat Capacity, J/kg-K 490
980
Thermal Conductivity, W/m-K 24
130
Thermal Expansion, µm/m-K 10
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
25
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
130

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
13
Density, g/cm3 7.6
1.8
Embodied Carbon, kg CO2/kg material 2.1
24
Embodied Energy, MJ/kg 29
160
Embodied Water, L/kg 100
950

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
67
Thermal Diffusivity, mm2/s 6.5
72

Alloy Composition

Carbon (C), % 0.3 to 0.5
0
Chromium (Cr), % 12 to 14
0
Iron (Fe), % 80.4 to 86.7
0
Magnesium (Mg), % 0
94.9 to 97.1
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 1.0 to 2.5
0
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
2.5 to 4.0
Zirconium (Zr), % 0
0.45 to 0.8
Residuals, % 0
0 to 0.3