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ZK40A Magnesium vs. Nickel 718

ZK40A magnesium belongs to the magnesium alloys classification, while nickel 718 belongs to the nickel 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 nickel 718.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 4.2
12 to 50
Fatigue Strength, MPa 190
460 to 760
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
75
Shear Strength, MPa 160
660 to 950
Tensile Strength: Ultimate (UTS), MPa 280
930 to 1530
Tensile Strength: Yield (Proof), MPa 260
510 to 1330

Thermal Properties

Latent Heat of Fusion, J/g 340
310
Maximum Temperature: Mechanical, °C 120
980
Melting Completion (Liquidus), °C 600
1340
Melting Onset (Solidus), °C 540
1260
Specific Heat Capacity, J/kg-K 970
450
Thermal Conductivity, W/m-K 110
11
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 130
1.5

Otherwise Unclassified Properties

Base Metal Price, % relative 13
75
Density, g/cm3 1.8
8.3
Embodied Carbon, kg CO2/kg material 24
13
Embodied Energy, MJ/kg 160
190
Embodied Water, L/kg 950
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12
140 to 390
Resilience: Unit (Modulus of Resilience), kJ/m3 740
660 to 4560
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 65
23
Strength to Weight: Axial, points 43
31 to 51
Strength to Weight: Bending, points 53
25 to 35
Thermal Diffusivity, mm2/s 62
3.0
Thermal Shock Resistance, points 17
27 to 44

Alloy Composition

Aluminum (Al), % 0
0.2 to 0.8
Boron (B), % 0
0 to 0.0060
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
17 to 21
Cobalt (Co), % 0
0 to 1.0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 0
11.1 to 24.6
Magnesium (Mg), % 94.2 to 96.1
0
Manganese (Mn), % 0
0 to 0.35
Molybdenum (Mo), % 0
2.8 to 3.3
Nickel (Ni), % 0
50 to 55
Niobium (Nb), % 0
4.8 to 5.5
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0
0 to 0.35
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0
0.65 to 1.2
Zinc (Zn), % 3.5 to 4.5
0
Zirconium (Zr), % 0.45 to 1.0
0
Residuals, % 0 to 0.3
0