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6101 Aluminum vs. C68700 Brass

6101 aluminum belongs to the aluminum alloys classification, while C68700 brass belongs to the copper alloys. There are 20 material properties with values for both materials. Properties with values for just one material (7, 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 6101 aluminum and the bottom bar is C68700 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
110
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 26
41

Thermal Properties

Latent Heat of Fusion, J/g 400
190
Maximum Temperature: Mechanical, °C 160
160
Melting Completion (Liquidus), °C 650
970
Melting Onset (Solidus), °C 620
930
Specific Heat Capacity, J/kg-K 900
400
Thermal Conductivity, W/m-K 220 to 230
100
Thermal Expansion, µm/m-K 23
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 57 to 60
23
Electrical Conductivity: Equal Weight (Specific), % IACS 190 to 200
25

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
26
Density, g/cm3 2.7
8.3
Embodied Carbon, kg CO2/kg material 8.3
2.8
Embodied Energy, MJ/kg 150
46
Embodied Water, L/kg 1190
340

Common Calculations

Stiffness to Weight: Axial, points 14
7.3
Stiffness to Weight: Bending, points 50
19
Thermal Diffusivity, mm2/s 89 to 93
30

Alloy Composition

Aluminum (Al), % 97.6 to 99.4
1.8 to 2.5
Arsenic (As), % 0
0.020 to 0.1
Boron (B), % 0 to 0.060
0
Chromium (Cr), % 0 to 0.030
0
Copper (Cu), % 0 to 0.1
76 to 79
Iron (Fe), % 0 to 0.5
0 to 0.060
Lead (Pb), % 0
0 to 0.070
Magnesium (Mg), % 0.35 to 0.8
0
Manganese (Mn), % 0 to 0.030
0
Silicon (Si), % 0.3 to 0.7
0
Zinc (Zn), % 0 to 0.1
17.8 to 22.2
Residuals, % 0
0 to 0.5