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4145 Aluminum vs. 4147 Aluminum

Both 4145 aluminum and 4147 aluminum are aluminum alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a very high 96% of their average alloy composition in common.

For each property being compared, the top bar is 4145 aluminum and the bottom bar is 4147 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
72
Elongation at Break, % 2.2
3.3
Fatigue Strength, MPa 48
42
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 28
27
Shear Strength, MPa 69
63
Tensile Strength: Ultimate (UTS), MPa 120
110
Tensile Strength: Yield (Proof), MPa 68
59

Thermal Properties

Brazing Temperature, °C 570 to 600
580 to 600
Latent Heat of Fusion, J/g 540
570
Maximum Temperature: Mechanical, °C 160
160
Melting Completion (Liquidus), °C 590
580
Melting Onset (Solidus), °C 520
560
Specific Heat Capacity, J/kg-K 880
900
Thermal Conductivity, W/m-K 100
130
Thermal Expansion, µm/m-K 21
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
33
Electrical Conductivity: Equal Weight (Specific), % IACS 84
120

Otherwise Unclassified Properties

Base Metal Price, % relative 10
9.5
Density, g/cm3 2.8
2.5
Embodied Carbon, kg CO2/kg material 7.6
7.7
Embodied Energy, MJ/kg 140
140
Embodied Water, L/kg 1040
1050

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3
3.1
Resilience: Unit (Modulus of Resilience), kJ/m3 31
24
Stiffness to Weight: Axial, points 14
16
Stiffness to Weight: Bending, points 50
55
Strength to Weight: Axial, points 12
12
Strength to Weight: Bending, points 19
20
Thermal Diffusivity, mm2/s 42
58
Thermal Shock Resistance, points 5.5
5.2

Alloy Composition

Aluminum (Al), % 83 to 87.4
85 to 88.9
Beryllium (Be), % 0
0 to 0.00030
Chromium (Cr), % 0 to 0.15
0
Copper (Cu), % 3.3 to 4.7
0 to 0.25
Iron (Fe), % 0 to 0.8
0 to 0.8
Magnesium (Mg), % 0 to 0.15
0.1 to 0.5
Manganese (Mn), % 0 to 0.15
0 to 0.1
Silicon (Si), % 9.3 to 10.7
11 to 13
Zinc (Zn), % 0 to 0.2
0 to 0.2
Residuals, % 0 to 0.15
0 to 0.15