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6105 Aluminum vs. C66900 Brass

6105 aluminum belongs to the aluminum alloys classification, while C66900 brass belongs to the copper alloys. There are 27 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 6105 aluminum and the bottom bar is C66900 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
120
Elongation at Break, % 9.0 to 16
1.1 to 26
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 26
45
Shear Strength, MPa 120 to 170
290 to 440
Tensile Strength: Ultimate (UTS), MPa 190 to 280
460 to 770
Tensile Strength: Yield (Proof), MPa 120 to 270
330 to 760

Thermal Properties

Latent Heat of Fusion, J/g 410
190
Maximum Temperature: Mechanical, °C 160
150
Melting Completion (Liquidus), °C 650
860
Melting Onset (Solidus), °C 600
850
Specific Heat Capacity, J/kg-K 900
400
Thermal Expansion, µm/m-K 23
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 46 to 50
3.4
Electrical Conductivity: Equal Weight (Specific), % IACS 150 to 170
3.8

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
23
Density, g/cm3 2.7
8.2
Embodied Carbon, kg CO2/kg material 8.3
2.8
Embodied Energy, MJ/kg 150
46
Embodied Water, L/kg 1180
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 25 to 27
4.6 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 100 to 550
460 to 2450
Stiffness to Weight: Axial, points 14
8.1
Stiffness to Weight: Bending, points 51
20
Strength to Weight: Axial, points 20 to 29
15 to 26
Strength to Weight: Bending, points 28 to 35
16 to 23
Thermal Shock Resistance, points 8.6 to 12
14 to 23

Alloy Composition

Aluminum (Al), % 97.2 to 99
0
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 0 to 0.1
62.5 to 64.5
Iron (Fe), % 0 to 0.35
0 to 0.25
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 0.45 to 0.8
0
Manganese (Mn), % 0 to 0.1
11.5 to 12.5
Silicon (Si), % 0.6 to 1.0
0
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.1
22.5 to 26
Residuals, % 0
0 to 0.2