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5251 Aluminum vs. 518.0 Aluminum

Both 5251 aluminum and 518.0 aluminum are aluminum alloys. They have a moderately high 93% of their average alloy composition in common.

For each property being compared, the top bar is 5251 aluminum and the bottom bar is 518.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 44 to 79
80
Elastic (Young's, Tensile) Modulus, GPa 68
67
Elongation at Break, % 2.0 to 19
5.0
Fatigue Strength, MPa 59 to 110
140
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
25
Shear Strength, MPa 110 to 160
200
Tensile Strength: Ultimate (UTS), MPa 180 to 280
310
Tensile Strength: Yield (Proof), MPa 67 to 250
190

Thermal Properties

Latent Heat of Fusion, J/g 400
390
Maximum Temperature: Mechanical, °C 180
170
Melting Completion (Liquidus), °C 650
620
Melting Onset (Solidus), °C 610
560
Specific Heat Capacity, J/kg-K 900
900
Thermal Conductivity, W/m-K 150
98
Thermal Expansion, µm/m-K 24
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
24
Electrical Conductivity: Equal Weight (Specific), % IACS 120
81

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
9.4
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1180
1160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.4 to 27
14
Resilience: Unit (Modulus of Resilience), kJ/m3 33 to 450
270
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
51
Strength to Weight: Axial, points 18 to 29
32
Strength to Weight: Bending, points 26 to 35
38
Thermal Diffusivity, mm2/s 61
40
Thermal Shock Resistance, points 7.9 to 13
14

Alloy Composition

Aluminum (Al), % 95.5 to 98.2
88.1 to 92.5
Chromium (Cr), % 0 to 0.15
0
Copper (Cu), % 0 to 0.15
0 to 0.25
Iron (Fe), % 0 to 0.5
0 to 1.8
Magnesium (Mg), % 1.7 to 2.4
7.5 to 8.5
Manganese (Mn), % 0.1 to 0.5
0 to 0.35
Nickel (Ni), % 0
0 to 0.15
Silicon (Si), % 0 to 0.4
0 to 0.35
Tin (Sn), % 0
0 to 0.15
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.15
0 to 0.15
Residuals, % 0 to 0.15
0 to 0.25