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7049 Aluminum vs. SAE-AISI T4 Steel

7049 aluminum belongs to the aluminum alloys classification, while SAE-AISI T4 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (11, 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 7049 aluminum and the bottom bar is SAE-AISI T4 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
210
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 27
80
Tensile Strength: Ultimate (UTS), MPa 510 to 530
800 to 2140

Thermal Properties

Latent Heat of Fusion, J/g 370
250
Melting Completion (Liquidus), °C 640
1810
Melting Onset (Solidus), °C 480
1750
Specific Heat Capacity, J/kg-K 860
410
Thermal Conductivity, W/m-K 130
21
Thermal Expansion, µm/m-K 23
12

Otherwise Unclassified Properties

Base Metal Price, % relative 10
55
Density, g/cm3 3.1
9.4
Embodied Carbon, kg CO2/kg material 8.1
8.5
Embodied Energy, MJ/kg 140
130
Embodied Water, L/kg 1110
120

Common Calculations

Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 45
21
Strength to Weight: Axial, points 46 to 47
24 to 64
Strength to Weight: Bending, points 46 to 47
20 to 39
Thermal Diffusivity, mm2/s 51
5.4
Thermal Shock Resistance, points 22 to 23
24 to 64

Alloy Composition

Aluminum (Al), % 85.7 to 89.5
0
Carbon (C), % 0
0.7 to 0.8
Chromium (Cr), % 0.1 to 0.22
3.8 to 4.5
Cobalt (Co), % 0
4.3 to 5.8
Copper (Cu), % 1.2 to 1.9
0 to 0.25
Iron (Fe), % 0 to 0.35
66.3 to 72.3
Magnesium (Mg), % 2.0 to 2.9
0
Manganese (Mn), % 0 to 0.2
0.1 to 0.4
Molybdenum (Mo), % 0
0.4 to 1.0
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.25
0.2 to 0.4
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0
17.5 to 19
Vanadium (V), % 0
0.8 to 1.2
Zinc (Zn), % 7.2 to 8.2
0
Residuals, % 0 to 0.15
0