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3105 Aluminum vs. C21000 Brass

3105 aluminum belongs to the aluminum alloys classification, while C21000 brass belongs to the copper alloys. There are 29 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 C21000 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
110
Elongation at Break, % 1.1 to 20
2.9 to 50
Poisson's Ratio 0.33
0.34
Shear Modulus, GPa 26
43
Shear Strength, MPa 77 to 140
180 to 280
Tensile Strength: Ultimate (UTS), MPa 120 to 240
240 to 450
Tensile Strength: Yield (Proof), MPa 46 to 220
69 to 440

Thermal Properties

Latent Heat of Fusion, J/g 400
200
Maximum Temperature: Mechanical, °C 180
190
Melting Completion (Liquidus), °C 660
1070
Melting Onset (Solidus), °C 640
1050
Specific Heat Capacity, J/kg-K 900
390
Thermal Conductivity, W/m-K 170
230
Thermal Expansion, µm/m-K 24
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 44
56
Electrical Conductivity: Equal Weight (Specific), % IACS 140
57

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
30
Density, g/cm3 2.8
8.8
Embodied Carbon, kg CO2/kg material 8.2
2.6
Embodied Energy, MJ/kg 150
42
Embodied Water, L/kg 1180
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.6 to 19
13 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 15 to 340
21 to 830
Stiffness to Weight: Axial, points 14
7.2
Stiffness to Weight: Bending, points 50
18
Strength to Weight: Axial, points 12 to 24
7.4 to 14
Strength to Weight: Bending, points 20 to 31
9.6 to 15
Thermal Diffusivity, mm2/s 68
69
Thermal Shock Resistance, points 5.2 to 11
8.1 to 15

Alloy Composition

Aluminum (Al), % 96 to 99.5
0
Chromium (Cr), % 0 to 0.2
0
Copper (Cu), % 0 to 0.3
94 to 96
Iron (Fe), % 0 to 0.7
0 to 0.050
Lead (Pb), % 0
0 to 0.030
Magnesium (Mg), % 0.2 to 0.8
0
Manganese (Mn), % 0.3 to 0.8
0
Silicon (Si), % 0 to 0.6
0
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.4
3.7 to 6.0
Residuals, % 0
0 to 0.2