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6101B Aluminum vs. SAE-AISI D7 Steel

6101B aluminum belongs to the aluminum alloys classification, while SAE-AISI D7 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (10, 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 6101B aluminum and the bottom bar is SAE-AISI D7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
190
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
73
Tensile Strength: Ultimate (UTS), MPa 190 to 250
800 to 2120

Thermal Properties

Latent Heat of Fusion, J/g 400
270
Melting Completion (Liquidus), °C 640
1440
Melting Onset (Solidus), °C 630
1400
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 210
27
Thermal Expansion, µm/m-K 23
11

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
10
Density, g/cm3 2.7
7.6
Embodied Carbon, kg CO2/kg material 8.3
11
Embodied Energy, MJ/kg 150
180
Embodied Water, L/kg 1190
130

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 20 to 25
29 to 78
Strength to Weight: Bending, points 27 to 32
25 to 48
Thermal Diffusivity, mm2/s 87
7.4
Thermal Shock Resistance, points 8.5 to 11
27 to 72

Alloy Composition

Aluminum (Al), % 98.2 to 99.3
0
Carbon (C), % 0
2.2 to 2.5
Chromium (Cr), % 0
11.5 to 13.5
Copper (Cu), % 0 to 0.050
0 to 0.25
Iron (Fe), % 0.1 to 0.3
76.6 to 81.9
Magnesium (Mg), % 0.35 to 0.6
0
Manganese (Mn), % 0 to 0.050
0 to 0.6
Molybdenum (Mo), % 0
0.7 to 1.2
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0.3 to 0.6
0 to 0.6
Sulfur (S), % 0
0 to 0.030
Vanadium (V), % 0
3.8 to 4.4
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.1
0