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5251 Aluminum vs. A357.0 Aluminum

Both 5251 aluminum and A357.0 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 A357.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 44 to 79
100
Elastic (Young's, Tensile) Modulus, GPa 68
70
Elongation at Break, % 2.0 to 19
3.7
Fatigue Strength, MPa 59 to 110
100
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 110 to 160
240
Tensile Strength: Ultimate (UTS), MPa 180 to 280
350
Tensile Strength: Yield (Proof), MPa 67 to 250
270

Thermal Properties

Latent Heat of Fusion, J/g 400
500
Maximum Temperature: Mechanical, °C 180
170
Melting Completion (Liquidus), °C 650
610
Melting Onset (Solidus), °C 610
560
Specific Heat Capacity, J/kg-K 900
900
Thermal Conductivity, W/m-K 150
160
Thermal Expansion, µm/m-K 24
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
40
Electrical Conductivity: Equal Weight (Specific), % IACS 120
140

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
12
Density, g/cm3 2.7
2.6
Embodied Carbon, kg CO2/kg material 8.5
8.2
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1180
1110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.4 to 27
12
Resilience: Unit (Modulus of Resilience), kJ/m3 33 to 450
520
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
53
Strength to Weight: Axial, points 18 to 29
38
Strength to Weight: Bending, points 26 to 35
43
Thermal Diffusivity, mm2/s 61
68
Thermal Shock Resistance, points 7.9 to 13
17

Alloy Composition

Aluminum (Al), % 95.5 to 98.2
90.8 to 93
Beryllium (Be), % 0
0.040 to 0.070
Chromium (Cr), % 0 to 0.15
0
Copper (Cu), % 0 to 0.15
0 to 0.2
Iron (Fe), % 0 to 0.5
0 to 0.2
Magnesium (Mg), % 1.7 to 2.4
0.4 to 0.7
Manganese (Mn), % 0.1 to 0.5
0 to 0.1
Silicon (Si), % 0 to 0.4
6.5 to 7.5
Titanium (Ti), % 0 to 0.15
0.040 to 0.2
Zinc (Zn), % 0 to 0.15
0 to 0.1
Residuals, % 0 to 0.15
0 to 0.15