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S40920 Stainless Steel vs. ZE41A Magnesium

S40920 stainless steel belongs to the iron alloys classification, while ZE41A magnesium belongs to the magnesium alloys. There are 31 material properties with values for both materials. Properties with values for just one material (6, 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 S40920 stainless steel and the bottom bar is ZE41A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
63
Elastic (Young's, Tensile) Modulus, GPa 190
45
Elongation at Break, % 22
3.3
Fatigue Strength, MPa 130
98
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
18
Shear Strength, MPa 270
150
Tensile Strength: Ultimate (UTS), MPa 430
210
Tensile Strength: Yield (Proof), MPa 190
140

Thermal Properties

Latent Heat of Fusion, J/g 270
330
Maximum Temperature: Mechanical, °C 710
150
Melting Completion (Liquidus), °C 1450
640
Melting Onset (Solidus), °C 1400
540
Specific Heat Capacity, J/kg-K 480
970
Thermal Conductivity, W/m-K 26
110
Thermal Expansion, µm/m-K 10
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
27
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
130

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
18
Density, g/cm3 7.7
1.9
Embodied Carbon, kg CO2/kg material 2.0
24
Embodied Energy, MJ/kg 28
170
Embodied Water, L/kg 94
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 78
6.1
Resilience: Unit (Modulus of Resilience), kJ/m3 97
220
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
63
Strength to Weight: Axial, points 15
31
Strength to Weight: Bending, points 16
41
Thermal Diffusivity, mm2/s 6.9
59
Thermal Shock Resistance, points 15
12

Alloy Composition

Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 10.5 to 11.7
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 85.1 to 89.4
0
Magnesium (Mg), % 0
91.7 to 95.4
Manganese (Mn), % 0 to 1.0
0 to 0.15
Nickel (Ni), % 0 to 0.5
0 to 0.010
Niobium (Nb), % 0 to 0.1
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0.15 to 0.5
0
Unspecified Rare Earths, % 0
0.75 to 1.8
Zinc (Zn), % 0
3.5 to 5.0
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3