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2025 Aluminum vs. C66700 Brass

2025 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 2025 aluminum and the bottom bar is C66700 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
110
Elongation at Break, % 15
2.0 to 58
Poisson's Ratio 0.33
0.31
Shear Modulus, GPa 27
41
Shear Strength, MPa 240
250 to 530
Tensile Strength: Ultimate (UTS), MPa 400
340 to 690
Tensile Strength: Yield (Proof), MPa 260
100 to 640

Thermal Properties

Latent Heat of Fusion, J/g 400
180
Maximum Temperature: Mechanical, °C 190
140
Melting Completion (Liquidus), °C 640
1090
Melting Onset (Solidus), °C 520
1050
Specific Heat Capacity, J/kg-K 870
390
Thermal Conductivity, W/m-K 150
97
Thermal Expansion, µm/m-K 23
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
17
Electrical Conductivity: Equal Weight (Specific), % IACS 120
19

Otherwise Unclassified Properties

Base Metal Price, % relative 10
25
Density, g/cm3 3.0
8.2
Embodied Carbon, kg CO2/kg material 7.9
2.7
Embodied Energy, MJ/kg 150
45
Embodied Water, L/kg 1130
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 55
13 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 450
49 to 1900
Stiffness to Weight: Axial, points 13
7.3
Stiffness to Weight: Bending, points 46
19
Strength to Weight: Axial, points 37
11 to 23
Strength to Weight: Bending, points 40
13 to 21
Thermal Diffusivity, mm2/s 58
30
Thermal Shock Resistance, points 18
11 to 23

Alloy Composition

Aluminum (Al), % 90.9 to 95.2
0
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.9 to 5.0
68.5 to 71.5
Iron (Fe), % 0 to 1.0
0 to 0.1
Lead (Pb), % 0
0 to 0.070
Magnesium (Mg), % 0 to 0.050
0
Manganese (Mn), % 0.4 to 1.2
0.8 to 1.5
Silicon (Si), % 0.5 to 1.2
0
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
26.3 to 30.7
Residuals, % 0
0 to 0.5