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C87500 Brass vs. 4045 Aluminum

C87500 brass belongs to the copper alloys classification, while 4045 aluminum belongs to the aluminum alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, 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 C87500 brass and the bottom bar is 4045 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
71
Elongation at Break, % 18
2.3
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 42
27
Tensile Strength: Ultimate (UTS), MPa 460
120
Tensile Strength: Yield (Proof), MPa 190
64

Thermal Properties

Latent Heat of Fusion, J/g 260
540
Maximum Temperature: Mechanical, °C 170
160
Melting Completion (Liquidus), °C 920
600
Melting Onset (Solidus), °C 820
580
Specific Heat Capacity, J/kg-K 410
900
Thermal Conductivity, W/m-K 28
170
Thermal Expansion, µm/m-K 18
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.7
45
Electrical Conductivity: Equal Weight (Specific), % IACS 7.3
160

Otherwise Unclassified Properties

Base Metal Price, % relative 27
9.5
Density, g/cm3 8.3
2.6
Embodied Carbon, kg CO2/kg material 2.7
7.8
Embodied Energy, MJ/kg 44
150
Embodied Water, L/kg 300
1070

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67
2.4
Resilience: Unit (Modulus of Resilience), kJ/m3 160
29
Stiffness to Weight: Axial, points 7.4
15
Stiffness to Weight: Bending, points 19
54
Strength to Weight: Axial, points 16
13
Strength to Weight: Bending, points 16
21
Thermal Diffusivity, mm2/s 8.3
74
Thermal Shock Resistance, points 17
5.7

Alloy Composition

Aluminum (Al), % 0 to 0.5
87.4 to 91
Copper (Cu), % 79 to 85
0 to 0.3
Iron (Fe), % 0
0 to 0.8
Lead (Pb), % 0 to 0.5
0
Magnesium (Mg), % 0
0 to 0.050
Manganese (Mn), % 0
0 to 0.050
Silicon (Si), % 3.0 to 5.0
9.0 to 11
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 12 to 16
0 to 0.1
Residuals, % 0
0 to 0.15