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5657 Aluminum vs. 5251 Aluminum

Both 5657 aluminum and 5251 aluminum are aluminum alloys. They have a very high 98% of their average alloy composition in common.

For each property being compared, the top bar is 5657 aluminum and the bottom bar is 5251 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 40 to 50
44 to 79
Elastic (Young's, Tensile) Modulus, GPa 68
68
Elongation at Break, % 6.6 to 15
2.0 to 19
Fatigue Strength, MPa 74 to 88
59 to 110
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 92 to 110
110 to 160
Tensile Strength: Ultimate (UTS), MPa 150 to 200
180 to 280
Tensile Strength: Yield (Proof), MPa 140 to 170
67 to 250

Thermal Properties

Latent Heat of Fusion, J/g 400
400
Maximum Temperature: Mechanical, °C 180
180
Melting Completion (Liquidus), °C 660
650
Melting Onset (Solidus), °C 640
610
Specific Heat Capacity, J/kg-K 900
900
Thermal Conductivity, W/m-K 210
150
Thermal Expansion, µm/m-K 24
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 54
37
Electrical Conductivity: Equal Weight (Specific), % IACS 180
120

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.5
Density, g/cm3 2.7
2.7
Embodied Carbon, kg CO2/kg material 8.4
8.5
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 1200
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 9.7 to 27
5.4 to 27
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 200
33 to 450
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
50
Strength to Weight: Axial, points 15 to 20
18 to 29
Strength to Weight: Bending, points 23 to 28
26 to 35
Thermal Diffusivity, mm2/s 84
61
Thermal Shock Resistance, points 6.7 to 8.6
7.9 to 13

Alloy Composition

Aluminum (Al), % 98.5 to 99.4
95.5 to 98.2
Chromium (Cr), % 0
0 to 0.15
Copper (Cu), % 0 to 0.1
0 to 0.15
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.1
0 to 0.5
Magnesium (Mg), % 0.6 to 1.0
1.7 to 2.4
Manganese (Mn), % 0 to 0.030
0.1 to 0.5
Silicon (Si), % 0 to 0.080
0 to 0.4
Titanium (Ti), % 0
0 to 0.15
Vanadium (V), % 0 to 0.050
0
Zinc (Zn), % 0 to 0.050
0 to 0.15
Residuals, % 0 to 0.050
0 to 0.15

Comparable Variants