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7049 Aluminum vs. SAE-AISI H25 Steel

7049 aluminum belongs to the aluminum alloys classification, while SAE-AISI H25 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 H25 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
710 to 1620

Thermal Properties

Latent Heat of Fusion, J/g 370
250
Melting Completion (Liquidus), °C 640
1750
Melting Onset (Solidus), °C 480
1700
Specific Heat Capacity, J/kg-K 860
420
Thermal Conductivity, W/m-K 130
26
Thermal Expansion, µm/m-K 23
12

Otherwise Unclassified Properties

Base Metal Price, % relative 10
38
Density, g/cm3 3.1
9.1
Embodied Carbon, kg CO2/kg material 8.1
6.2
Embodied Energy, MJ/kg 140
93
Embodied Water, L/kg 1110
83

Common Calculations

Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 45
22
Strength to Weight: Axial, points 46 to 47
22 to 50
Strength to Weight: Bending, points 46 to 47
20 to 34
Thermal Diffusivity, mm2/s 51
6.7
Thermal Shock Resistance, points 22 to 23
22 to 49

Alloy Composition

Aluminum (Al), % 85.7 to 89.5
0
Carbon (C), % 0
0.22 to 0.32
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
77.2 to 81.3
Magnesium (Mg), % 2.0 to 2.9
0
Manganese (Mn), % 0 to 0.2
0.15 to 0.4
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.25
0.15 to 0.4
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0
14 to 16
Vanadium (V), % 0
0.4 to 0.6
Zinc (Zn), % 7.2 to 8.2
0
Residuals, % 0 to 0.15
0