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Nickel 690 vs. 2025 Aluminum

Nickel 690 belongs to the nickel alloys classification, while 2025 aluminum belongs to the aluminum alloys. 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 690 and the bottom bar is 2025 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 90
110
Elastic (Young's, Tensile) Modulus, GPa 200
72
Elongation at Break, % 3.4 to 34
15
Fatigue Strength, MPa 180 to 300
130
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 79
27
Shear Strength, MPa 420 to 570
240
Tensile Strength: Ultimate (UTS), MPa 640 to 990
400
Tensile Strength: Yield (Proof), MPa 250 to 760
260

Thermal Properties

Latent Heat of Fusion, J/g 320
400
Maximum Temperature: Mechanical, °C 1010
190
Melting Completion (Liquidus), °C 1380
640
Melting Onset (Solidus), °C 1340
520
Specific Heat Capacity, J/kg-K 470
870
Thermal Conductivity, W/m-K 14
150
Thermal Expansion, µm/m-K 14
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.5
40
Electrical Conductivity: Equal Weight (Specific), % IACS 1.6
120

Otherwise Unclassified Properties

Base Metal Price, % relative 50
10
Density, g/cm3 8.3
3.0
Embodied Carbon, kg CO2/kg material 8.2
7.9
Embodied Energy, MJ/kg 120
150
Embodied Water, L/kg 290
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31 to 170
55
Resilience: Unit (Modulus of Resilience), kJ/m3 160 to 1440
450
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
46
Strength to Weight: Axial, points 21 to 33
37
Strength to Weight: Bending, points 20 to 27
40
Thermal Diffusivity, mm2/s 3.5
58
Thermal Shock Resistance, points 16 to 25
18

Alloy Composition

Aluminum (Al), % 0
90.9 to 95.2
Carbon (C), % 0 to 0.050
0
Chromium (Cr), % 27 to 31
0 to 0.1
Copper (Cu), % 0 to 0.5
3.9 to 5.0
Iron (Fe), % 7.0 to 11
0 to 1.0
Magnesium (Mg), % 0
0 to 0.050
Manganese (Mn), % 0 to 0.5
0.4 to 1.2
Nickel (Ni), % 58 to 66
0
Silicon (Si), % 0 to 0.5
0.5 to 1.2
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15