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6061 Aluminum vs. 6351 Aluminum

Both 6061 aluminum and 6351 aluminum are aluminum alloys. 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 aluminum and the bottom bar is 6351 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
69
Elongation at Break, % 3.4 to 20
7.8 to 18
Fatigue Strength, MPa 58 to 110
79 to 130
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 84 to 210
84 to 200
Tensile Strength: Ultimate (UTS), MPa 130 to 410
140 to 310
Tensile Strength: Yield (Proof), MPa 76 to 370
95 to 270

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 3.8 to 81
20 to 38
Resilience: Unit (Modulus of Resilience), kJ/m3 42 to 1000
65 to 540
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
50
Strength to Weight: Axial, points 13 to 42
14 to 32
Strength to Weight: Bending, points 21 to 45
22 to 38
Thermal Diffusivity, mm2/s 68
72
Thermal Shock Resistance, points 5.7 to 18
6.1 to 14

Alloy Composition

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

Comparable Variants