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5070 Aluminum vs. ASTM A387 Grade 91 Class 2

5070 aluminum belongs to the aluminum alloys classification, while ASTM A387 grade 91 class 2 belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is 5070 aluminum and the bottom bar is ASTM A387 grade 91 class 2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
190
Elongation at Break, % 20
20
Fatigue Strength, MPa 150
330
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
75
Shear Strength, MPa 190
420
Tensile Strength: Ultimate (UTS), MPa 300
670
Tensile Strength: Yield (Proof), MPa 140
470

Thermal Properties

Latent Heat of Fusion, J/g 390
270
Maximum Temperature: Mechanical, °C 190
600
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 550
1420
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 130
26
Thermal Expansion, µm/m-K 24
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
8.9
Electrical Conductivity: Equal Weight (Specific), % IACS 100
10

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
7.0
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 8.8
2.6
Embodied Energy, MJ/kg 150
37
Embodied Water, L/kg 1170
88

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 51
120
Resilience: Unit (Modulus of Resilience), kJ/m3 150
580
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 31
24
Strength to Weight: Bending, points 37
22
Thermal Diffusivity, mm2/s 53
6.9
Thermal Shock Resistance, points 14
19

Alloy Composition


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Aluminum (Al), % 92.4 to 95.7
0 to 0.020
Carbon (C), % 0
0.080 to 0.12
Chromium (Cr), % 0 to 0.3
8.0 to 9.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 0 to 0.4
87.3 to 90.3
Magnesium (Mg), % 3.5 to 4.5
0
Manganese (Mn), % 0.4 to 0.8
0.3 to 0.6
Molybdenum (Mo), % 0
0.85 to 1.1
Nickel (Ni), % 0
0 to 0.4
Niobium (Nb), % 0
0.060 to 0.1
Nitrogen (N), % 0
0.030 to 0.070
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.25
0.2 to 0.5
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0 to 0.15
0 to 0.010
Vanadium (V), % 0
0.18 to 0.25
Zinc (Zn), % 0.4 to 0.8
0
Zirconium (Zr), % 0
0 to 0.010
Residuals, % 0 to 0.15
0