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5251 Aluminum vs. 5657 Aluminum

Both 5251 aluminum and 5657 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 5251 aluminum and the bottom bar is 5657 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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

Comparable Variants