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ISO-WD32250 Magnesium vs. S41045 Stainless Steel

ISO-WD32250 magnesium belongs to the magnesium alloys classification, while S41045 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-WD32250 magnesium and the bottom bar is S41045 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 4.5 to 8.6
25
Fatigue Strength, MPa 170 to 210
160
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
76
Shear Strength, MPa 180 to 190
280
Tensile Strength: Ultimate (UTS), MPa 310 to 330
430
Tensile Strength: Yield (Proof), MPa 240 to 290
230

Thermal Properties

Latent Heat of Fusion, J/g 340
270
Maximum Temperature: Mechanical, °C 120
740
Melting Completion (Liquidus), °C 600
1450
Melting Onset (Solidus), °C 550
1400
Specific Heat Capacity, J/kg-K 980
480
Thermal Conductivity, W/m-K 130
29
Thermal Expansion, µm/m-K 26
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 130
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 13
8.5
Density, g/cm3 1.8
7.8
Embodied Carbon, kg CO2/kg material 24
2.2
Embodied Energy, MJ/kg 160
31
Embodied Water, L/kg 950
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 14 to 26
92
Resilience: Unit (Modulus of Resilience), kJ/m3 630 to 930
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 67
25
Strength to Weight: Axial, points 49 to 51
16
Strength to Weight: Bending, points 58 to 60
16
Thermal Diffusivity, mm2/s 72
7.8
Thermal Shock Resistance, points 19 to 20
16

Alloy Composition


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Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
12 to 13
Iron (Fe), % 0
83.8 to 88
Magnesium (Mg), % 94.9 to 97.1
0
Manganese (Mn), % 0
0 to 1.0
Nickel (Ni), % 0
0 to 0.5
Niobium (Nb), % 0
0 to 0.6
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
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