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Nickel 690 vs. 4145 Aluminum

Nickel 690 belongs to the nickel alloys classification, while 4145 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 690 and the bottom bar is 4145 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
73
Elongation at Break, % 3.4 to 34
2.2
Fatigue Strength, MPa 180 to 300
48
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 79
28
Shear Strength, MPa 420 to 570
69
Tensile Strength: Ultimate (UTS), MPa 640 to 990
120
Tensile Strength: Yield (Proof), MPa 250 to 760
68

Thermal Properties

Latent Heat of Fusion, J/g 320
540
Maximum Temperature: Mechanical, °C 1010
160
Melting Completion (Liquidus), °C 1380
590
Melting Onset (Solidus), °C 1340
520
Specific Heat Capacity, J/kg-K 470
880
Thermal Conductivity, W/m-K 14
100
Thermal Expansion, µm/m-K 14
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.5
26
Electrical Conductivity: Equal Weight (Specific), % IACS 1.6
84

Otherwise Unclassified Properties

Base Metal Price, % relative 50
10
Density, g/cm3 8.3
2.8
Embodied Carbon, kg CO2/kg material 8.2
7.6
Embodied Energy, MJ/kg 120
140
Embodied Water, L/kg 290
1040

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31 to 170
2.3
Resilience: Unit (Modulus of Resilience), kJ/m3 160 to 1440
31
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 21 to 33
12
Strength to Weight: Bending, points 20 to 27
19
Thermal Diffusivity, mm2/s 3.5
42
Thermal Shock Resistance, points 16 to 25
5.5

Alloy Composition

Aluminum (Al), % 0
83 to 87.4
Carbon (C), % 0 to 0.050
0
Chromium (Cr), % 27 to 31
0 to 0.15
Copper (Cu), % 0 to 0.5
3.3 to 4.7
Iron (Fe), % 7.0 to 11
0 to 0.8
Magnesium (Mg), % 0
0 to 0.15
Manganese (Mn), % 0 to 0.5
0 to 0.15
Nickel (Ni), % 58 to 66
0
Silicon (Si), % 0 to 0.5
9.3 to 10.7
Sulfur (S), % 0 to 0.015
0
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.15