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ISO-WD32250 Magnesium vs. AISI 316L Stainless Steel

ISO-WD32250 magnesium belongs to the magnesium alloys classification, while AISI 316L 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 ISO-WD32250 magnesium and the bottom bar is AISI 316L stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 4.5 to 8.6
9.0 to 50
Fatigue Strength, MPa 170 to 210
170 to 450
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
78
Shear Strength, MPa 180 to 190
370 to 690
Tensile Strength: Ultimate (UTS), MPa 310 to 330
530 to 1160
Tensile Strength: Yield (Proof), MPa 240 to 290
190 to 870

Thermal Properties

Latent Heat of Fusion, J/g 340
290
Maximum Temperature: Mechanical, °C 120
870
Melting Completion (Liquidus), °C 600
1400
Melting Onset (Solidus), °C 550
1380
Specific Heat Capacity, J/kg-K 980
470
Thermal Conductivity, W/m-K 130
15
Thermal Expansion, µm/m-K 26
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 130
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 13
19
Density, g/cm3 1.8
7.9
Embodied Carbon, kg CO2/kg material 24
3.9
Embodied Energy, MJ/kg 160
53
Embodied Water, L/kg 950
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 14 to 26
77 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 630 to 930
93 to 1880
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 67
25
Strength to Weight: Axial, points 49 to 51
19 to 41
Strength to Weight: Bending, points 58 to 60
18 to 31
Thermal Diffusivity, mm2/s 72
4.1
Thermal Shock Resistance, points 19 to 20
12 to 25

Alloy Composition


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Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
16 to 18
Iron (Fe), % 0
62 to 72
Magnesium (Mg), % 94.9 to 97.1
0
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 0
10 to 14
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 2.5 to 4.0
0
Zirconium (Zr), % 0.45 to 0.8
0
Residuals, % 0 to 0.3
0