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2024 Aluminum vs. C68800 Brass

2024 aluminum belongs to the aluminum alloys classification, while C68800 brass belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, 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 2024 aluminum and the bottom bar is C68800 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
110
Elongation at Break, % 4.0 to 16
2.0 to 36
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 27
41
Shear Strength, MPa 130 to 320
380 to 510
Tensile Strength: Ultimate (UTS), MPa 200 to 540
570 to 890
Tensile Strength: Yield (Proof), MPa 100 to 490
390 to 790

Thermal Properties

Latent Heat of Fusion, J/g 390
190
Maximum Temperature: Mechanical, °C 200
160
Melting Completion (Liquidus), °C 640
960
Melting Onset (Solidus), °C 500
950
Specific Heat Capacity, J/kg-K 880
400
Thermal Conductivity, W/m-K 120
40
Thermal Expansion, µm/m-K 23
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 30
18
Electrical Conductivity: Equal Weight (Specific), % IACS 90
20

Otherwise Unclassified Properties

Base Metal Price, % relative 11
26
Density, g/cm3 3.0
8.2
Embodied Carbon, kg CO2/kg material 8.3
2.8
Embodied Energy, MJ/kg 150
48
Embodied Water, L/kg 1140
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20 to 68
16 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 70 to 1680
710 to 2860
Stiffness to Weight: Axial, points 13
7.3
Stiffness to Weight: Bending, points 46
19
Strength to Weight: Axial, points 18 to 50
19 to 30
Strength to Weight: Bending, points 25 to 49
19 to 25
Thermal Diffusivity, mm2/s 46
12
Thermal Shock Resistance, points 8.6 to 24
19 to 30

Alloy Composition

Aluminum (Al), % 90.7 to 94.7
3.0 to 3.8
Chromium (Cr), % 0 to 0.1
0
Cobalt (Co), % 0
0.25 to 0.55
Copper (Cu), % 3.8 to 4.9
70.8 to 75.5
Iron (Fe), % 0 to 0.5
0 to 0.2
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0.3 to 0.9
0
Silicon (Si), % 0 to 0.5
0
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
21.3 to 24.1
Zirconium (Zr), % 0 to 0.2
0
Residuals, % 0
0 to 0.5