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6061-T51 Aluminum vs. 6351-T51 Aluminum

Both 6061-T51 aluminum and 6351-T51 aluminum are aluminum alloys. Both are furnished in the T51 temper. Their average alloy composition is basically identical. 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 6061-T51 aluminum and the bottom bar is 6351-T51 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
69
Elongation at Break, % 7.8
7.8
Fatigue Strength, MPa 110
130
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 160
160
Tensile Strength: Ultimate (UTS), MPa 270
280
Tensile Strength: Yield (Proof), MPa 230
260

Thermal Properties

Latent Heat of Fusion, J/g 400
410
Maximum Temperature: Mechanical, °C 170
160
Melting Completion (Liquidus), °C 650
650
Melting Onset (Solidus), °C 580
570
Specific Heat Capacity, J/kg-K 900
900
Thermal Conductivity, W/m-K 170
180
Thermal Expansion, µm/m-K 24
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 43
46
Electrical Conductivity: Equal Weight (Specific), % IACS 140
150

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20
21
Resilience: Unit (Modulus of Resilience), kJ/m3 400
500
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
50
Strength to Weight: Axial, points 27
29
Strength to Weight: Bending, points 34
35
Thermal Diffusivity, mm2/s 68
72
Thermal Shock Resistance, points 12
12

Alloy Composition


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Aluminum (Al), % 95.9 to 98.6
96 to 98.5
Chromium (Cr), % 0.040 to 0.35
0
Copper (Cu), % 0.15 to 0.4
0 to 0.1
Iron (Fe), % 0 to 0.7
0 to 0.5
Magnesium (Mg), % 0.8 to 1.2
0.4 to 0.8
Manganese (Mn), % 0 to 0.15
0.4 to 0.8
Silicon (Si), % 0.4 to 0.8
0.7 to 1.3
Titanium (Ti), % 0 to 0.15
0 to 0.2
Zinc (Zn), % 0 to 0.25
0 to 0.2
Residuals, % 0 to 0.15
0 to 0.15