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6261 Aluminum vs. 4145 Aluminum

Both 6261 aluminum and 4145 aluminum are aluminum alloys. They have 87% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is 6261 aluminum and the bottom bar is 4145 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
73
Elongation at Break, % 9.0 to 16
2.2
Fatigue Strength, MPa 60 to 120
48
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
28
Shear Strength, MPa 90 to 180
69
Tensile Strength: Ultimate (UTS), MPa 150 to 300
120
Tensile Strength: Yield (Proof), MPa 100 to 260
68

Thermal Properties

Latent Heat of Fusion, J/g 400
540
Maximum Temperature: Mechanical, °C 160
160
Melting Completion (Liquidus), °C 640
590
Melting Onset (Solidus), °C 610
520
Specific Heat Capacity, J/kg-K 900
880
Thermal Conductivity, W/m-K 180
100
Thermal Expansion, µm/m-K 23
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 48
26
Electrical Conductivity: Equal Weight (Specific), % IACS 160
84

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
10
Density, g/cm3 2.7
2.8
Embodied Carbon, kg CO2/kg material 8.3
7.6
Embodied Energy, MJ/kg 150
140
Embodied Water, L/kg 1180
1040

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 21 to 27
2.3
Resilience: Unit (Modulus of Resilience), kJ/m3 77 to 500
31
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
50
Strength to Weight: Axial, points 15 to 31
12
Strength to Weight: Bending, points 23 to 37
19
Thermal Diffusivity, mm2/s 75
42
Thermal Shock Resistance, points 6.5 to 13
5.5

Alloy Composition

Aluminum (Al), % 96.6 to 98.6
83 to 87.4
Chromium (Cr), % 0 to 0.1
0 to 0.15
Copper (Cu), % 0.15 to 0.4
3.3 to 4.7
Iron (Fe), % 0 to 0.4
0 to 0.8
Magnesium (Mg), % 0.7 to 1.0
0 to 0.15
Manganese (Mn), % 0.2 to 0.35
0 to 0.15
Silicon (Si), % 0.4 to 0.7
9.3 to 10.7
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.2
0 to 0.2
Residuals, % 0
0 to 0.15