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7049 Aluminum vs. 5251 Aluminum

Both 7049 aluminum and 5251 aluminum are aluminum alloys. They have a moderately high 90% of their average alloy composition in common.

For each property being compared, the top bar is 7049 aluminum and the bottom bar is 5251 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
44 to 79
Elastic (Young's, Tensile) Modulus, GPa 70
68
Elongation at Break, % 6.2 to 7.0
2.0 to 19
Fatigue Strength, MPa 160 to 170
59 to 110
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 27
26
Shear Strength, MPa 300 to 310
110 to 160
Tensile Strength: Ultimate (UTS), MPa 510 to 530
180 to 280
Tensile Strength: Yield (Proof), MPa 420 to 450
67 to 250

Thermal Properties

Latent Heat of Fusion, J/g 370
400
Maximum Temperature: Mechanical, °C 180
180
Melting Completion (Liquidus), °C 640
650
Melting Onset (Solidus), °C 480
610
Specific Heat Capacity, J/kg-K 860
900
Thermal Conductivity, W/m-K 130
150
Thermal Expansion, µm/m-K 23
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
37
Electrical Conductivity: Equal Weight (Specific), % IACS 110
120

Otherwise Unclassified Properties

Base Metal Price, % relative 10
9.5
Density, g/cm3 3.1
2.7
Embodied Carbon, kg CO2/kg material 8.1
8.5
Embodied Energy, MJ/kg 140
150
Embodied Water, L/kg 1110
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31 to 34
5.4 to 27
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 1440
33 to 450
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 45
50
Strength to Weight: Axial, points 46 to 47
18 to 29
Strength to Weight: Bending, points 46 to 47
26 to 35
Thermal Diffusivity, mm2/s 51
61
Thermal Shock Resistance, points 22 to 23
7.9 to 13

Alloy Composition

Aluminum (Al), % 85.7 to 89.5
95.5 to 98.2
Chromium (Cr), % 0.1 to 0.22
0 to 0.15
Copper (Cu), % 1.2 to 1.9
0 to 0.15
Iron (Fe), % 0 to 0.35
0 to 0.5
Magnesium (Mg), % 2.0 to 2.9
1.7 to 2.4
Manganese (Mn), % 0 to 0.2
0.1 to 0.5
Silicon (Si), % 0 to 0.25
0 to 0.4
Titanium (Ti), % 0 to 0.1
0 to 0.15
Zinc (Zn), % 7.2 to 8.2
0 to 0.15
Residuals, % 0
0 to 0.15