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2218 Aluminum vs. C34200 Brass

2218 aluminum belongs to the aluminum alloys classification, while C34200 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 2218 aluminum and the bottom bar is C34200 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
100
Elongation at Break, % 6.8 to 10
3.0 to 17
Poisson's Ratio 0.33
0.31
Shear Modulus, GPa 27
40
Shear Strength, MPa 210 to 250
230 to 360
Tensile Strength: Ultimate (UTS), MPa 330 to 430
370 to 650
Tensile Strength: Yield (Proof), MPa 260 to 310
150 to 420

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
9.0 to 98
Resilience: Unit (Modulus of Resilience), kJ/m3 450 to 650
110 to 870
Stiffness to Weight: Axial, points 13
7.1
Stiffness to Weight: Bending, points 45
19
Strength to Weight: Axial, points 30 to 39
13 to 22
Strength to Weight: Bending, points 34 to 41
14 to 20
Thermal Diffusivity, mm2/s 52
37
Thermal Shock Resistance, points 15 to 19
12 to 22

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 0.1
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