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Nickel 685 vs. 2017A Aluminum

Nickel 685 belongs to the nickel alloys classification, while 2017A aluminum belongs to the aluminum alloys. There are 28 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 nickel 685 and the bottom bar is 2017A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
71
Elongation at Break, % 17
2.2 to 14
Fatigue Strength, MPa 470
92 to 130
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 77
27
Shear Strength, MPa 770
120 to 270
Tensile Strength: Ultimate (UTS), MPa 1250
200 to 460
Tensile Strength: Yield (Proof), MPa 850
110 to 290

Thermal Properties

Latent Heat of Fusion, J/g 320
390
Maximum Temperature: Mechanical, °C 1000
220
Melting Completion (Liquidus), °C 1380
650
Melting Onset (Solidus), °C 1330
510
Specific Heat Capacity, J/kg-K 460
880
Thermal Conductivity, W/m-K 13
150
Thermal Expansion, µm/m-K 12
23

Otherwise Unclassified Properties

Base Metal Price, % relative 75
11
Density, g/cm3 8.4
3.0
Embodied Carbon, kg CO2/kg material 10
8.2
Embodied Energy, MJ/kg 140
150
Embodied Water, L/kg 340
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
6.7 to 53
Resilience: Unit (Modulus of Resilience), kJ/m3 1820
90 to 570
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
46
Strength to Weight: Axial, points 42
19 to 42
Strength to Weight: Bending, points 31
26 to 44
Thermal Diffusivity, mm2/s 3.3
56
Thermal Shock Resistance, points 37
8.9 to 20

Alloy Composition

Aluminum (Al), % 1.2 to 1.6
91.3 to 95.5
Boron (B), % 0.0030 to 0.010
0
Carbon (C), % 0.030 to 0.1
0
Chromium (Cr), % 18 to 21
0 to 0.1
Cobalt (Co), % 12 to 15
0
Copper (Cu), % 0 to 0.5
3.5 to 4.5
Iron (Fe), % 0 to 2.0
0 to 0.7
Magnesium (Mg), % 0
0.4 to 1.0
Manganese (Mn), % 0 to 1.0
0.4 to 1.0
Molybdenum (Mo), % 3.5 to 5.0
0
Nickel (Ni), % 49.6 to 62.5
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 0.75
0.2 to 0.8
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 2.8 to 3.3
0 to 0.25
Zinc (Zn), % 0.020 to 0.12
0 to 0.25
Zirconium (Zr), % 0
0 to 0.25
Residuals, % 0
0 to 0.15