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ZK40A Magnesium vs. S44626 Stainless Steel

ZK40A magnesium belongs to the magnesium alloys classification, while S44626 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 S44626 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 4.2
23
Fatigue Strength, MPa 190
230
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 17
80
Shear Strength, MPa 160
340
Tensile Strength: Ultimate (UTS), MPa 280
540
Tensile Strength: Yield (Proof), MPa 260
350

Thermal Properties

Latent Heat of Fusion, J/g 340
300
Maximum Temperature: Mechanical, °C 120
1100
Melting Completion (Liquidus), °C 600
1440
Melting Onset (Solidus), °C 540
1390
Specific Heat Capacity, J/kg-K 970
480
Thermal Conductivity, W/m-K 110
17
Thermal Expansion, µm/m-K 26
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 130
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 13
14
Density, g/cm3 1.8
7.7
Embodied Carbon, kg CO2/kg material 24
2.9
Embodied Energy, MJ/kg 160
42
Embodied Water, L/kg 950
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12
110
Resilience: Unit (Modulus of Resilience), kJ/m3 740
300
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 65
26
Strength to Weight: Axial, points 43
19
Strength to Weight: Bending, points 53
19
Thermal Diffusivity, mm2/s 62
4.6
Thermal Shock Resistance, points 17
18

Alloy Composition


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Carbon (C), % 0
0 to 0.060
Chromium (Cr), % 0
25 to 27
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 0
68.1 to 74.1
Magnesium (Mg), % 94.2 to 96.1
0
Manganese (Mn), % 0
0 to 0.75
Molybdenum (Mo), % 0
0.75 to 1.5
Nickel (Ni), % 0
0 to 0.5
Nitrogen (N), % 0
0 to 0.040
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 0.75
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0
0.2 to 1.0
Zinc (Zn), % 3.5 to 4.5
0
Zirconium (Zr), % 0.45 to 1.0
0
Residuals, % 0 to 0.3
0