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1070A Aluminum vs. 5251 Aluminum

Both 1070A aluminum and 5251 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 1070A aluminum and the bottom bar is 5251 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 18 to 40
44 to 79
Elastic (Young's, Tensile) Modulus, GPa 68
68
Elongation at Break, % 2.3 to 33
2.0 to 19
Fatigue Strength, MPa 17 to 51
59 to 110
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 44 to 81
110 to 160
Tensile Strength: Ultimate (UTS), MPa 68 to 140
180 to 280
Tensile Strength: Yield (Proof), MPa 17 to 120
67 to 250

Thermal Properties

Latent Heat of Fusion, J/g 400
400
Maximum Temperature: Mechanical, °C 170
180
Melting Completion (Liquidus), °C 640
650
Melting Onset (Solidus), °C 640
610
Specific Heat Capacity, J/kg-K 900
900
Thermal Conductivity, W/m-K 230
150
Thermal Expansion, µm/m-K 23
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 60
37
Electrical Conductivity: Equal Weight (Specific), % IACS 200
120

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
9.5
Density, g/cm3 2.7
2.7
Embodied Carbon, kg CO2/kg material 8.2
8.5
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1200
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.0 to 18
5.4 to 27
Resilience: Unit (Modulus of Resilience), kJ/m3 2.1 to 100
33 to 450
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
50
Strength to Weight: Axial, points 7.0 to 14
18 to 29
Strength to Weight: Bending, points 14 to 22
26 to 35
Thermal Diffusivity, mm2/s 94
61
Thermal Shock Resistance, points 3.1 to 6.3
7.9 to 13

Alloy Composition


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Aluminum (Al), % 99.7 to 100
95.5 to 98.2
Chromium (Cr), % 0
0 to 0.15
Copper (Cu), % 0 to 0.030
0 to 0.15
Iron (Fe), % 0 to 0.25
0 to 0.5
Magnesium (Mg), % 0 to 0.030
1.7 to 2.4
Manganese (Mn), % 0 to 0.030
0.1 to 0.5
Silicon (Si), % 0 to 0.2
0 to 0.4
Titanium (Ti), % 0 to 0.030
0 to 0.15
Zinc (Zn), % 0 to 0.070
0 to 0.15
Residuals, % 0
0 to 0.15

Comparable Variants