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C24000 Brass vs. 4145 Aluminum

C24000 brass belongs to the copper alloys classification, while 4145 aluminum belongs to the aluminum alloys. There are 24 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 C24000 brass and the bottom bar is 4145 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
73
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 42
28
Tensile Strength: Ultimate (UTS), MPa 310 to 640
120

Thermal Properties

Latent Heat of Fusion, J/g 190
540
Maximum Temperature: Mechanical, °C 160
160
Melting Completion (Liquidus), °C 1000
590
Melting Onset (Solidus), °C 970
520
Specific Heat Capacity, J/kg-K 390
880
Thermal Conductivity, W/m-K 140
100
Thermal Expansion, µm/m-K 19
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 32
26
Electrical Conductivity: Equal Weight (Specific), % IACS 34
84

Otherwise Unclassified Properties

Base Metal Price, % relative 27
10
Density, g/cm3 8.5
2.8
Embodied Carbon, kg CO2/kg material 2.6
7.6
Embodied Energy, MJ/kg 43
140
Embodied Water, L/kg 320
1040

Common Calculations

Stiffness to Weight: Axial, points 7.2
14
Stiffness to Weight: Bending, points 19
50
Strength to Weight: Axial, points 10 to 21
12
Strength to Weight: Bending, points 12 to 20
19
Thermal Diffusivity, mm2/s 43
42
Thermal Shock Resistance, points 10 to 22
5.5

Alloy Composition

Aluminum (Al), % 0
83 to 87.4
Chromium (Cr), % 0
0 to 0.15
Copper (Cu), % 78.5 to 81.5
3.3 to 4.7
Iron (Fe), % 0 to 0.050
0 to 0.8
Lead (Pb), % 0 to 0.050
0
Magnesium (Mg), % 0
0 to 0.15
Manganese (Mn), % 0
0 to 0.15
Silicon (Si), % 0
9.3 to 10.7
Zinc (Zn), % 18.2 to 21.5
0 to 0.2
Residuals, % 0
0 to 0.15