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AS41B Magnesium vs. S32050 Stainless Steel

AS41B magnesium belongs to the magnesium alloys classification, while S32050 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 AS41B magnesium and the bottom bar is S32050 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
210
Elongation at Break, % 6.0
46
Fatigue Strength, MPa 97
340
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
81
Shear Strength, MPa 120
540
Tensile Strength: Ultimate (UTS), MPa 210
770
Tensile Strength: Yield (Proof), MPa 140
370

Thermal Properties

Latent Heat of Fusion, J/g 370
310
Maximum Temperature: Mechanical, °C 110
1100
Melting Completion (Liquidus), °C 620
1460
Melting Onset (Solidus), °C 570
1410
Specific Heat Capacity, J/kg-K 1000
470
Thermal Conductivity, W/m-K 68
12
Thermal Expansion, µm/m-K 26
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 92
2.1

Otherwise Unclassified Properties

Base Metal Price, % relative 12
31
Density, g/cm3 1.7
8.0
Embodied Carbon, kg CO2/kg material 23
6.0
Embodied Energy, MJ/kg 160
81
Embodied Water, L/kg 980
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
290
Resilience: Unit (Modulus of Resilience), kJ/m3 220
330
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 72
25
Strength to Weight: Axial, points 35
27
Strength to Weight: Bending, points 47
23
Thermal Diffusivity, mm2/s 41
3.3
Thermal Shock Resistance, points 13
17

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
22 to 24
Copper (Cu), % 0 to 0.020
0 to 0.4
Iron (Fe), % 0 to 0.0035
43.1 to 51.8
Magnesium (Mg), % 92.7 to 95.7
0
Manganese (Mn), % 0.35 to 0.7
0 to 1.5
Molybdenum (Mo), % 0
6.0 to 6.6
Nickel (Ni), % 0 to 0.0020
20 to 23
Nitrogen (N), % 0
0.21 to 0.32
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0.5 to 1.5
0 to 1.0
Sulfur (S), % 0
0 to 0.020
Zinc (Zn), % 0 to 0.12
0