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3105 Aluminum vs. C68100 Brass

3105 aluminum belongs to the aluminum alloys classification, while C68100 brass belongs to the copper alloys. There are 28 material properties with values for both materials. Properties with values for just one material (5, 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 3105 aluminum and the bottom bar is C68100 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
100
Elongation at Break, % 1.1 to 20
29
Poisson's Ratio 0.33
0.3
Shear Modulus, GPa 26
40
Tensile Strength: Ultimate (UTS), MPa 120 to 240
380
Tensile Strength: Yield (Proof), MPa 46 to 220
140

Thermal Properties

Latent Heat of Fusion, J/g 400
170
Maximum Temperature: Mechanical, °C 180
120
Melting Completion (Liquidus), °C 660
890
Melting Onset (Solidus), °C 640
870
Specific Heat Capacity, J/kg-K 900
390
Thermal Conductivity, W/m-K 170
98
Thermal Expansion, µm/m-K 24
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 44
24
Electrical Conductivity: Equal Weight (Specific), % IACS 140
27

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
23
Density, g/cm3 2.8
7.9
Embodied Carbon, kg CO2/kg material 8.2
2.8
Embodied Energy, MJ/kg 150
47
Embodied Water, L/kg 1180
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.6 to 19
86
Resilience: Unit (Modulus of Resilience), kJ/m3 15 to 340
94
Stiffness to Weight: Axial, points 14
7.3
Stiffness to Weight: Bending, points 50
20
Strength to Weight: Axial, points 12 to 24
13
Strength to Weight: Bending, points 20 to 31
15
Thermal Diffusivity, mm2/s 68
32
Thermal Shock Resistance, points 5.2 to 11
13

Alloy Composition

Aluminum (Al), % 96 to 99.5
0 to 0.010
Chromium (Cr), % 0 to 0.2
0
Copper (Cu), % 0 to 0.3
56 to 60
Iron (Fe), % 0 to 0.7
0.25 to 1.3
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 0.2 to 0.8
0
Manganese (Mn), % 0.3 to 0.8
0.010 to 0.5
Silicon (Si), % 0 to 0.6
0.040 to 0.15
Tin (Sn), % 0
0.75 to 1.1
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.4
36.4 to 43
Residuals, % 0
0 to 0.5