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7049 Aluminum vs. SAE-AISI T2 Steel

7049 aluminum belongs to the aluminum alloys classification, while SAE-AISI T2 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 T2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 27
79
Tensile Strength: Ultimate (UTS), MPa 510 to 530
780 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 370
250
Melting Completion (Liquidus), °C 640
1820
Melting Onset (Solidus), °C 480
1760
Specific Heat Capacity, J/kg-K 860
410
Thermal Conductivity, W/m-K 130
19
Thermal Expansion, µm/m-K 23
12

Otherwise Unclassified Properties

Base Metal Price, % relative 10
46
Density, g/cm3 3.1
9.3
Embodied Carbon, kg CO2/kg material 8.1
11
Embodied Energy, MJ/kg 140
170
Embodied Water, L/kg 1110
98

Common Calculations

Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 45
21
Strength to Weight: Axial, points 46 to 47
23 to 64
Strength to Weight: Bending, points 46 to 47
20 to 40
Thermal Diffusivity, mm2/s 51
4.9
Thermal Shock Resistance, points 22 to 23
23 to 65

Alloy Composition

Aluminum (Al), % 85.7 to 89.5
0
Carbon (C), % 0
0.8 to 0.9
Chromium (Cr), % 0.1 to 0.22
3.8 to 4.5
Copper (Cu), % 1.2 to 1.9
0 to 0.25
Iron (Fe), % 0 to 0.35
70.8 to 75.8
Magnesium (Mg), % 2.0 to 2.9
0
Manganese (Mn), % 0 to 0.2
0.2 to 0.4
Molybdenum (Mo), % 0
0 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
1.8 to 2.4
Zinc (Zn), % 7.2 to 8.2
0
Residuals, % 0 to 0.15
0