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C68000 Brass vs. 2025 Aluminum

C68000 brass belongs to the copper alloys classification, while 2025 aluminum belongs to the aluminum alloys. There are 26 material properties with values for both materials. Properties with values for just one material (6, 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 C68000 brass and the bottom bar is 2025 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
72
Elongation at Break, % 27
15
Poisson's Ratio 0.3
0.33
Shear Modulus, GPa 40
27
Tensile Strength: Ultimate (UTS), MPa 390
400
Tensile Strength: Yield (Proof), MPa 140
260

Thermal Properties

Latent Heat of Fusion, J/g 170
400
Maximum Temperature: Mechanical, °C 120
190
Melting Completion (Liquidus), °C 880
640
Melting Onset (Solidus), °C 870
520
Specific Heat Capacity, J/kg-K 390
870
Thermal Conductivity, W/m-K 96
150
Thermal Expansion, µm/m-K 21
23

Otherwise Unclassified Properties

Base Metal Price, % relative 23
10
Density, g/cm3 8.0
3.0
Embodied Carbon, kg CO2/kg material 2.8
7.9
Embodied Energy, MJ/kg 48
150
Embodied Water, L/kg 330
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 82
55
Resilience: Unit (Modulus of Resilience), kJ/m3 95
450
Stiffness to Weight: Axial, points 7.3
13
Stiffness to Weight: Bending, points 20
46
Strength to Weight: Axial, points 14
37
Strength to Weight: Bending, points 15
40
Thermal Diffusivity, mm2/s 31
58
Thermal Shock Resistance, points 13
18

Alloy Composition

Aluminum (Al), % 0 to 0.010
90.9 to 95.2
Chromium (Cr), % 0
0 to 0.1
Copper (Cu), % 56 to 60
3.9 to 5.0
Iron (Fe), % 0.25 to 1.3
0 to 1.0
Lead (Pb), % 0 to 0.050
0
Magnesium (Mg), % 0
0 to 0.050
Manganese (Mn), % 0.010 to 0.5
0.4 to 1.2
Nickel (Ni), % 0.2 to 0.8
0
Silicon (Si), % 0.040 to 0.15
0.5 to 1.2
Tin (Sn), % 0.75 to 1.1
0
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 35.6 to 42.8
0 to 0.25
Residuals, % 0
0 to 0.15