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6261 Aluminum vs. ACI-ASTM CB7Cu-1 Steel

6261 aluminum belongs to the aluminum alloys classification, while ACI-ASTM CB7Cu-1 steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (5, 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 6261 aluminum and the bottom bar is ACI-ASTM CB7Cu-1 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
190
Elongation at Break, % 9.0 to 16
5.7 to 11
Fatigue Strength, MPa 60 to 120
420 to 590
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
76
Tensile Strength: Ultimate (UTS), MPa 150 to 300
960 to 1350
Tensile Strength: Yield (Proof), MPa 100 to 260
760 to 1180

Thermal Properties

Latent Heat of Fusion, J/g 400
280
Melting Completion (Liquidus), °C 640
1430
Melting Onset (Solidus), °C 610
1500
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 180
17
Thermal Expansion, µm/m-K 23
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 48
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 160
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
13
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 8.3
2.6
Embodied Energy, MJ/kg 150
38
Embodied Water, L/kg 1180
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 21 to 27
71 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 77 to 500
1500 to 3590
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 15 to 31
34 to 48
Strength to Weight: Bending, points 23 to 37
28 to 35
Thermal Diffusivity, mm2/s 75
4.6
Thermal Shock Resistance, points 6.5 to 13
32 to 45

Alloy Composition

Aluminum (Al), % 96.6 to 98.6
0
Carbon (C), % 0
0 to 0.070
Chromium (Cr), % 0 to 0.1
15.5 to 17.7
Copper (Cu), % 0.15 to 0.4
2.5 to 3.2
Iron (Fe), % 0 to 0.4
72.3 to 78.4
Magnesium (Mg), % 0.7 to 1.0
0
Manganese (Mn), % 0.2 to 0.35
0 to 0.7
Nickel (Ni), % 0
3.6 to 4.6
Niobium (Nb), % 0
0 to 0.35
Nitrogen (N), % 0
0 to 0.050
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0.4 to 0.7
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0