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C87500 Brass vs. 2218 Aluminum

C87500 brass belongs to the copper alloys classification, while 2218 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 2218 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
73
Elongation at Break, % 18
6.8 to 10
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 42
27
Tensile Strength: Ultimate (UTS), MPa 460
330 to 430
Tensile Strength: Yield (Proof), MPa 190
260 to 310

Thermal Properties

Latent Heat of Fusion, J/g 260
390
Maximum Temperature: Mechanical, °C 170
220
Melting Completion (Liquidus), °C 920
640
Melting Onset (Solidus), °C 820
510
Specific Heat Capacity, J/kg-K 410
870
Thermal Conductivity, W/m-K 28
140
Thermal Expansion, µm/m-K 18
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.7
37
Electrical Conductivity: Equal Weight (Specific), % IACS 7.3
110

Otherwise Unclassified Properties

Base Metal Price, % relative 27
11
Density, g/cm3 8.3
3.1
Embodied Carbon, kg CO2/kg material 2.7
8.2
Embodied Energy, MJ/kg 44
150
Embodied Water, L/kg 300
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67
27 to 31
Resilience: Unit (Modulus of Resilience), kJ/m3 160
450 to 650
Stiffness to Weight: Axial, points 7.4
13
Stiffness to Weight: Bending, points 19
45
Strength to Weight: Axial, points 16
30 to 39
Strength to Weight: Bending, points 16
34 to 41
Thermal Diffusivity, mm2/s 8.3
52
Thermal Shock Resistance, points 17
15 to 19

Alloy Composition

Aluminum (Al), % 0 to 0.5
88.8 to 93.6
Chromium (Cr), % 0
0 to 0.1
Copper (Cu), % 79 to 85
3.5 to 4.5
Iron (Fe), % 0
0 to 1.0
Lead (Pb), % 0 to 0.5
0
Magnesium (Mg), % 0
1.2 to 1.8
Manganese (Mn), % 0
0 to 0.2
Nickel (Ni), % 0
1.7 to 2.3
Silicon (Si), % 3.0 to 5.0
0 to 0.9
Zinc (Zn), % 12 to 16
0 to 0.25
Residuals, % 0
0 to 0.15