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4343 Aluminum vs. 4104 Aluminum

Both 4343 aluminum and 4104 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 4343 aluminum and the bottom bar is 4104 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
71
Elongation at Break, % 4.4
2.4
Fatigue Strength, MPa 45
42
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 27
27
Shear Strength, MPa 64
63
Tensile Strength: Ultimate (UTS), MPa 110
110
Tensile Strength: Yield (Proof), MPa 62
60

Thermal Properties

Brazing Temperature, °C 600 to 620
590 to 600
Latent Heat of Fusion, J/g 510
540
Maximum Temperature: Mechanical, °C 160
160
Melting Completion (Liquidus), °C 620
600
Melting Onset (Solidus), °C 580
560
Specific Heat Capacity, J/kg-K 900
900
Thermal Conductivity, W/m-K 180
130
Thermal Expansion, µm/m-K 22
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 44
33
Electrical Conductivity: Equal Weight (Specific), % IACS 150
120

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.5
Density, g/cm3 2.6
2.6
Embodied Carbon, kg CO2/kg material 7.9
8.0
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1100
1080

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.1
2.3
Resilience: Unit (Modulus of Resilience), kJ/m3 27
25
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 53
54
Strength to Weight: Axial, points 12
12
Strength to Weight: Bending, points 20
20
Thermal Diffusivity, mm2/s 77
58
Thermal Shock Resistance, points 5.2
5.1

Alloy Composition

Aluminum (Al), % 90.3 to 93.2
85.8 to 90
Bismuth (Bi), % 0
0.020 to 0.2
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 0 to 0.8
0 to 0.8
Magnesium (Mg), % 0
1.0 to 2.0
Manganese (Mn), % 0 to 0.1
0 to 0.1
Silicon (Si), % 6.8 to 8.2
9.0 to 10.5
Zinc (Zn), % 0 to 0.2
0 to 0.2
Residuals, % 0
0 to 0.15