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2024 Aluminum vs. C66700 Brass

2024 aluminum belongs to the aluminum alloys classification, while C66700 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 C66700 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 58
Poisson's Ratio 0.33
0.31
Shear Modulus, GPa 27
41
Shear Strength, MPa 130 to 320
250 to 530
Tensile Strength: Ultimate (UTS), MPa 200 to 540
340 to 690
Tensile Strength: Yield (Proof), MPa 100 to 490
100 to 640

Thermal Properties

Latent Heat of Fusion, J/g 390
180
Maximum Temperature: Mechanical, °C 200
140
Melting Completion (Liquidus), °C 640
1090
Melting Onset (Solidus), °C 500
1050
Specific Heat Capacity, J/kg-K 880
390
Thermal Conductivity, W/m-K 120
97
Thermal Expansion, µm/m-K 23
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 30
17
Electrical Conductivity: Equal Weight (Specific), % IACS 90
19

Otherwise Unclassified Properties

Base Metal Price, % relative 11
25
Density, g/cm3 3.0
8.2
Embodied Carbon, kg CO2/kg material 8.3
2.7
Embodied Energy, MJ/kg 150
45
Embodied Water, L/kg 1140
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20 to 68
13 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 70 to 1680
49 to 1900
Stiffness to Weight: Axial, points 13
7.3
Stiffness to Weight: Bending, points 46
19
Strength to Weight: Axial, points 18 to 50
11 to 23
Strength to Weight: Bending, points 25 to 49
13 to 21
Thermal Diffusivity, mm2/s 46
30
Thermal Shock Resistance, points 8.6 to 24
11 to 23

Alloy Composition

Aluminum (Al), % 90.7 to 94.7
0
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.8 to 4.9
68.5 to 71.5
Iron (Fe), % 0 to 0.5
0 to 0.1
Lead (Pb), % 0
0 to 0.070
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0.3 to 0.9
0.8 to 1.5
Silicon (Si), % 0 to 0.5
0
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
26.3 to 30.7
Zirconium (Zr), % 0 to 0.2
0
Residuals, % 0
0 to 0.5