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ZK40A Magnesium vs. S44535 Stainless Steel

ZK40A magnesium belongs to the magnesium alloys classification, while S44535 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 ZK40A magnesium and the bottom bar is S44535 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 4.2
28
Fatigue Strength, MPa 190
210
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 17
78
Shear Strength, MPa 160
290
Tensile Strength: Ultimate (UTS), MPa 280
450
Tensile Strength: Yield (Proof), MPa 260
290

Thermal Properties

Latent Heat of Fusion, J/g 340
290
Maximum Temperature: Mechanical, °C 120
1000
Melting Completion (Liquidus), °C 600
1430
Melting Onset (Solidus), °C 540
1390
Specific Heat Capacity, J/kg-K 970
480
Thermal Conductivity, W/m-K 110
21
Thermal Expansion, µm/m-K 26
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 130
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 13
11
Density, g/cm3 1.8
7.7
Embodied Carbon, kg CO2/kg material 24
2.4
Embodied Energy, MJ/kg 160
34
Embodied Water, L/kg 950
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12
110
Resilience: Unit (Modulus of Resilience), kJ/m3 740
200
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 65
25
Strength to Weight: Axial, points 43
16
Strength to Weight: Bending, points 53
17
Thermal Diffusivity, mm2/s 62
5.6
Thermal Shock Resistance, points 17
15

Alloy Composition


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Aluminum (Al), % 0
0 to 0.5
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
20 to 24
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 0
73.2 to 79.6
Lanthanum (La), % 0
0.040 to 0.2
Magnesium (Mg), % 94.2 to 96.1
0
Manganese (Mn), % 0
0.3 to 0.8
Phosphorus (P), % 0
0 to 0.050
Silicon (Si), % 0
0 to 0.5
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0
0.030 to 0.2
Zinc (Zn), % 3.5 to 4.5
0
Zirconium (Zr), % 0.45 to 1.0
0
Residuals, % 0 to 0.3
0