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5042 Aluminum vs. 6351 Aluminum

Both 5042 aluminum and 6351 aluminum are aluminum alloys. They have a very high 97% of their average alloy composition in common.

For each property being compared, the top bar is 5042 aluminum and the bottom bar is 6351 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
69
Elongation at Break, % 1.1 to 3.4
7.8 to 18
Fatigue Strength, MPa 97 to 120
79 to 130
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 200
84 to 200
Tensile Strength: Ultimate (UTS), MPa 340 to 360
140 to 310
Tensile Strength: Yield (Proof), MPa 270 to 310
95 to 270

Thermal Properties

Latent Heat of Fusion, J/g 400
410
Maximum Temperature: Mechanical, °C 180
160
Melting Completion (Liquidus), °C 640
650
Melting Onset (Solidus), °C 570
570
Specific Heat Capacity, J/kg-K 900
900
Thermal Conductivity, W/m-K 130
180
Thermal Expansion, µm/m-K 24
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
46
Electrical Conductivity: Equal Weight (Specific), % IACS 110
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 8.8
8.3
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1180
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.6 to 12
20 to 38
Resilience: Unit (Modulus of Resilience), kJ/m3 550 to 720
65 to 540
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
50
Strength to Weight: Axial, points 35 to 37
14 to 32
Strength to Weight: Bending, points 40 to 42
22 to 38
Thermal Diffusivity, mm2/s 53
72
Thermal Shock Resistance, points 15 to 16
6.1 to 14

Alloy Composition

Aluminum (Al), % 94.2 to 96.8
96 to 98.5
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 0 to 0.15
0 to 0.1
Iron (Fe), % 0 to 0.35
0 to 0.5
Magnesium (Mg), % 3.0 to 4.0
0.4 to 0.8
Manganese (Mn), % 0.2 to 0.5
0.4 to 0.8
Silicon (Si), % 0 to 0.2
0.7 to 1.3
Titanium (Ti), % 0 to 0.1
0 to 0.2
Zinc (Zn), % 0 to 0.25
0 to 0.2
Residuals, % 0
0 to 0.15