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EN 1.4729 Stainless Steel vs. M1A Magnesium

EN 1.4729 stainless steel belongs to the iron alloys classification, while M1A 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 M1A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
45
Elongation at Break, % 15
5.5
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
18

Thermal Properties

Latent Heat of Fusion, J/g 300
350
Maximum Temperature: Mechanical, °C 850
95
Melting Completion (Liquidus), °C 1420
610
Melting Onset (Solidus), °C 1380
580
Specific Heat Capacity, J/kg-K 490
990
Thermal Conductivity, W/m-K 24
150
Thermal Expansion, µm/m-K 10
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
35
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
190

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
12
Density, g/cm3 7.6
1.7
Embodied Carbon, kg CO2/kg material 2.1
24
Embodied Energy, MJ/kg 29
160
Embodied Water, L/kg 100
970

Common Calculations

Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
71
Thermal Diffusivity, mm2/s 6.5
88

Alloy Composition

Calcium (Ca), % 0
0 to 0.3
Carbon (C), % 0.3 to 0.5
0
Chromium (Cr), % 12 to 14
0
Copper (Cu), % 0
0 to 0.050
Iron (Fe), % 80.4 to 86.7
0
Magnesium (Mg), % 0
97.2 to 98.8
Manganese (Mn), % 0 to 1.0
1.2 to 2.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 1.0
0 to 0.010
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 1.0 to 2.5
0 to 0.1
Sulfur (S), % 0 to 0.030
0
Residuals, % 0
0 to 0.3