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Nickel 686 vs. ZK61A Magnesium

Nickel 686 belongs to the nickel alloys classification, while ZK61A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, 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 686 and the bottom bar is ZK61A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
46
Elongation at Break, % 51
5.8 to 7.1
Fatigue Strength, MPa 410
120 to 140
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 77
18
Shear Strength, MPa 560
170 to 180
Tensile Strength: Ultimate (UTS), MPa 780
290 to 310
Tensile Strength: Yield (Proof), MPa 350
180 to 200

Thermal Properties

Latent Heat of Fusion, J/g 320
330
Maximum Temperature: Mechanical, °C 980
120
Melting Completion (Liquidus), °C 1380
640
Melting Onset (Solidus), °C 1340
530
Specific Heat Capacity, J/kg-K 420
960
Thermal Conductivity, W/m-K 9.8
120
Thermal Expansion, µm/m-K 12
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
29
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
130

Otherwise Unclassified Properties

Base Metal Price, % relative 70
13
Density, g/cm3 9.0
1.9
Embodied Carbon, kg CO2/kg material 12
23
Embodied Energy, MJ/kg 170
160
Embodied Water, L/kg 300
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
15 to 19
Resilience: Unit (Modulus of Resilience), kJ/m3 280
370 to 420
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 22
62
Strength to Weight: Axial, points 24
42 to 45
Strength to Weight: Bending, points 21
50 to 53
Thermal Diffusivity, mm2/s 2.6
65
Thermal Shock Resistance, points 21
17 to 18

Alloy Composition

Carbon (C), % 0 to 0.010
0
Chromium (Cr), % 19 to 23
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 0 to 5.0
0
Magnesium (Mg), % 0
92.1 to 93.9
Manganese (Mn), % 0 to 0.75
0
Molybdenum (Mo), % 15 to 17
0
Nickel (Ni), % 49.5 to 63
0 to 0.010
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 0.080
0
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0.020 to 0.25
0
Tungsten (W), % 3.0 to 4.4
0
Zinc (Zn), % 0
5.5 to 6.5
Zirconium (Zr), % 0
0.6 to 1.0
Residuals, % 0
0 to 0.3