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4145 Aluminum vs. AWS ERNiCu-7

4145 aluminum belongs to the aluminum alloys classification, while AWS ERNiCu-7 belongs to the nickel alloys. There are 24 material properties with values for both materials. Properties with values for just one material (7, 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 4145 aluminum and the bottom bar is AWS ERNiCu-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
160
Elongation at Break, % 2.2
34
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 28
61
Tensile Strength: Ultimate (UTS), MPa 120
550

Thermal Properties

Latent Heat of Fusion, J/g 540
280
Melting Completion (Liquidus), °C 590
1280
Melting Onset (Solidus), °C 520
1240
Specific Heat Capacity, J/kg-K 880
440
Thermal Conductivity, W/m-K 100
20
Thermal Expansion, µm/m-K 21
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
3.2
Electrical Conductivity: Equal Weight (Specific), % IACS 84
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 10
50
Density, g/cm3 2.8
8.7
Embodied Carbon, kg CO2/kg material 7.6
8.5
Embodied Energy, MJ/kg 140
120
Embodied Water, L/kg 1040
250

Common Calculations

Stiffness to Weight: Axial, points 14
10
Stiffness to Weight: Bending, points 50
21
Strength to Weight: Axial, points 12
18
Strength to Weight: Bending, points 19
17
Thermal Diffusivity, mm2/s 42
5.3
Thermal Shock Resistance, points 5.5
19

Alloy Composition

Aluminum (Al), % 83 to 87.4
0 to 1.3
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0 to 0.15
0
Copper (Cu), % 3.3 to 4.7
18.3 to 36.5
Iron (Fe), % 0 to 0.8
0 to 2.5
Magnesium (Mg), % 0 to 0.15
0
Manganese (Mn), % 0 to 0.15
0 to 4.0
Nickel (Ni), % 0
62 to 69
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 9.3 to 10.7
0 to 1.3
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0
1.5 to 3.0
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0
0 to 0.5