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2618 Aluminum vs. 4145 Aluminum

Both 2618 aluminum and 4145 aluminum are aluminum alloys. They have 88% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is 2618 aluminum and the bottom bar is 4145 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
73
Elongation at Break, % 5.8
2.2
Fatigue Strength, MPa 110
48
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 27
28
Shear Strength, MPa 260
69
Tensile Strength: Ultimate (UTS), MPa 420
120
Tensile Strength: Yield (Proof), MPa 350
68

Thermal Properties

Latent Heat of Fusion, J/g 390
540
Maximum Temperature: Mechanical, °C 210
160
Melting Completion (Liquidus), °C 640
590
Melting Onset (Solidus), °C 550
520
Specific Heat Capacity, J/kg-K 880
880
Thermal Conductivity, W/m-K 160
100
Thermal Expansion, µm/m-K 22
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
26
Electrical Conductivity: Equal Weight (Specific), % IACS 110
84

Otherwise Unclassified Properties

Base Metal Price, % relative 11
10
Density, g/cm3 2.9
2.8
Embodied Carbon, kg CO2/kg material 8.3
7.6
Embodied Energy, MJ/kg 150
140
Embodied Water, L/kg 1150
1040

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23
2.3
Resilience: Unit (Modulus of Resilience), kJ/m3 850
31
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
50
Strength to Weight: Axial, points 40
12
Strength to Weight: Bending, points 42
19
Thermal Diffusivity, mm2/s 62
42
Thermal Shock Resistance, points 19
5.5

Alloy Composition

Aluminum (Al), % 92.4 to 94.9
83 to 87.4
Chromium (Cr), % 0
0 to 0.15
Copper (Cu), % 1.9 to 2.7
3.3 to 4.7
Iron (Fe), % 0.9 to 1.3
0 to 0.8
Magnesium (Mg), % 1.3 to 1.8
0 to 0.15
Manganese (Mn), % 0
0 to 0.15
Nickel (Ni), % 0.9 to 1.2
0
Silicon (Si), % 0.1 to 0.25
9.3 to 10.7
Titanium (Ti), % 0.040 to 0.1
0
Zinc (Zn), % 0 to 0.1
0 to 0.2
Residuals, % 0
0 to 0.15