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2218 Aluminum vs. C34500 Brass

2218 aluminum belongs to the aluminum alloys classification, while C34500 brass belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (2, 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 2218 aluminum and the bottom bar is C34500 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
100
Elongation at Break, % 6.8 to 10
12 to 28
Poisson's Ratio 0.33
0.31
Shear Modulus, GPa 27
40
Shear Strength, MPa 210 to 250
220 to 260
Tensile Strength: Ultimate (UTS), MPa 330 to 430
340 to 430
Tensile Strength: Yield (Proof), MPa 260 to 310
120 to 180

Thermal Properties

Latent Heat of Fusion, J/g 390
170
Maximum Temperature: Mechanical, °C 220
120
Melting Completion (Liquidus), °C 640
910
Melting Onset (Solidus), °C 510
890
Specific Heat Capacity, J/kg-K 870
380
Thermal Conductivity, W/m-K 140
120
Thermal Expansion, µm/m-K 22
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
26
Electrical Conductivity: Equal Weight (Specific), % IACS 110
29

Otherwise Unclassified Properties

Base Metal Price, % relative 11
24
Density, g/cm3 3.1
8.2
Embodied Carbon, kg CO2/kg material 8.2
2.6
Embodied Energy, MJ/kg 150
45
Embodied Water, L/kg 1130
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27 to 31
42 to 75
Resilience: Unit (Modulus of Resilience), kJ/m3 450 to 650
69 to 160
Stiffness to Weight: Axial, points 13
7.1
Stiffness to Weight: Bending, points 45
19
Strength to Weight: Axial, points 30 to 39
12 to 15
Strength to Weight: Bending, points 34 to 41
13 to 16
Thermal Diffusivity, mm2/s 52
37
Thermal Shock Resistance, points 15 to 19
11 to 14

Alloy Composition

Aluminum (Al), % 88.8 to 93.6
0
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.5 to 4.5
62 to 65
Iron (Fe), % 0 to 1.0
0 to 0.15
Lead (Pb), % 0
1.5 to 2.5
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.2
0
Nickel (Ni), % 1.7 to 2.3
0
Silicon (Si), % 0 to 0.9
0
Zinc (Zn), % 0 to 0.25
32 to 36.5
Residuals, % 0
0 to 0.4