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Nickel 718 vs. ZK51A Magnesium

Nickel 718 belongs to the nickel alloys classification, while ZK51A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, 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 nickel 718 and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
45
Elongation at Break, % 12 to 50
4.7
Fatigue Strength, MPa 460 to 760
62
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 75
18
Shear Strength, MPa 660 to 950
160
Tensile Strength: Ultimate (UTS), MPa 930 to 1530
240
Tensile Strength: Yield (Proof), MPa 510 to 1330
150

Thermal Properties

Latent Heat of Fusion, J/g 310
340
Maximum Temperature: Mechanical, °C 980
120
Melting Completion (Liquidus), °C 1340
640
Melting Onset (Solidus), °C 1260
550
Specific Heat Capacity, J/kg-K 450
970
Thermal Conductivity, W/m-K 11
110
Thermal Expansion, µm/m-K 13
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
28
Electrical Conductivity: Equal Weight (Specific), % IACS 1.5
140

Otherwise Unclassified Properties

Base Metal Price, % relative 75
13
Density, g/cm3 8.3
1.8
Embodied Carbon, kg CO2/kg material 13
24
Embodied Energy, MJ/kg 190
160
Embodied Water, L/kg 250
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 390
10
Resilience: Unit (Modulus of Resilience), kJ/m3 660 to 4560
260
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
64
Strength to Weight: Axial, points 31 to 51
36
Strength to Weight: Bending, points 25 to 35
47
Thermal Diffusivity, mm2/s 3.0
61
Thermal Shock Resistance, points 27 to 44
15

Alloy Composition

Aluminum (Al), % 0.2 to 0.8
0
Boron (B), % 0 to 0.0060
0
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 17 to 21
0
Cobalt (Co), % 0 to 1.0
0
Copper (Cu), % 0 to 0.3
0 to 0.1
Iron (Fe), % 11.1 to 24.6
0
Magnesium (Mg), % 0
93.1 to 95.9
Manganese (Mn), % 0 to 0.35
0
Molybdenum (Mo), % 2.8 to 3.3
0
Nickel (Ni), % 50 to 55
0 to 0.010
Niobium (Nb), % 4.8 to 5.5
0
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0 to 0.35
0
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0.65 to 1.2
0
Zinc (Zn), % 0
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3