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4145 Aluminum vs. 238.0 Aluminum

Both 4145 aluminum and 238.0 aluminum are aluminum alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a moderately high 92% of their average alloy composition in common. There are 29 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 4145 aluminum and the bottom bar is 238.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
76
Elongation at Break, % 2.2
1.5
Fatigue Strength, MPa 48
110
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 28
28
Tensile Strength: Ultimate (UTS), MPa 120
210
Tensile Strength: Yield (Proof), MPa 68
170

Thermal Properties

Latent Heat of Fusion, J/g 540
430
Maximum Temperature: Mechanical, °C 160
170
Melting Completion (Liquidus), °C 590
600
Melting Onset (Solidus), °C 520
510
Specific Heat Capacity, J/kg-K 880
840
Thermal Conductivity, W/m-K 100
100
Thermal Expansion, µm/m-K 21
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
25
Electrical Conductivity: Equal Weight (Specific), % IACS 84
67

Otherwise Unclassified Properties

Base Metal Price, % relative 10
12
Density, g/cm3 2.8
3.4
Embodied Carbon, kg CO2/kg material 7.6
7.4
Embodied Energy, MJ/kg 140
140
Embodied Water, L/kg 1040
1040

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3
2.9
Resilience: Unit (Modulus of Resilience), kJ/m3 31
180
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 50
42
Strength to Weight: Axial, points 12
17
Strength to Weight: Bending, points 19
23
Thermal Diffusivity, mm2/s 42
37
Thermal Shock Resistance, points 5.5
9.1

Alloy Composition


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Aluminum (Al), % 83 to 87.4
81.9 to 84.9
Chromium (Cr), % 0 to 0.15
0
Copper (Cu), % 3.3 to 4.7
9.5 to 10.5
Iron (Fe), % 0 to 0.8
1.0 to 1.5
Magnesium (Mg), % 0 to 0.15
0 to 0.25
Manganese (Mn), % 0 to 0.15
0
Silicon (Si), % 9.3 to 10.7
3.6 to 4.4
Zinc (Zn), % 0 to 0.2
1.0 to 1.5
Residuals, % 0 to 0.15
0