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2218 Aluminum vs. C85200 Brass

2218 aluminum belongs to the aluminum alloys classification, while C85200 brass belongs to the copper 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 2218 aluminum and the bottom bar is C85200 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
110
Elongation at Break, % 6.8 to 10
28
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 27
40
Tensile Strength: Ultimate (UTS), MPa 330 to 430
270
Tensile Strength: Yield (Proof), MPa 260 to 310
95

Thermal Properties

Latent Heat of Fusion, J/g 390
180
Maximum Temperature: Mechanical, °C 220
140
Melting Completion (Liquidus), °C 640
940
Melting Onset (Solidus), °C 510
930
Specific Heat Capacity, J/kg-K 870
380
Thermal Conductivity, W/m-K 140
84
Thermal Expansion, µm/m-K 22
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
18
Electrical Conductivity: Equal Weight (Specific), % IACS 110
19

Otherwise Unclassified Properties

Base Metal Price, % relative 11
26
Density, g/cm3 3.1
8.4
Embodied Carbon, kg CO2/kg material 8.2
2.8
Embodied Energy, MJ/kg 150
46
Embodied Water, L/kg 1130
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27 to 31
59
Resilience: Unit (Modulus of Resilience), kJ/m3 450 to 650
42
Stiffness to Weight: Axial, points 13
7.0
Stiffness to Weight: Bending, points 45
19
Strength to Weight: Axial, points 30 to 39
8.9
Strength to Weight: Bending, points 34 to 41
11
Thermal Diffusivity, mm2/s 52
27
Thermal Shock Resistance, points 15 to 19
9.3

Alloy Composition

Aluminum (Al), % 88.8 to 93.6
0 to 0.0050
Antimony (Sb), % 0
0 to 0.2
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.5 to 4.5
70 to 74
Iron (Fe), % 0 to 1.0
0 to 0.6
Lead (Pb), % 0
1.5 to 3.8
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.2
0
Nickel (Ni), % 1.7 to 2.3
0 to 1.0
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.9
0 to 0.050
Sulfur (S), % 0
0 to 0.050
Tin (Sn), % 0
0.7 to 2.0
Zinc (Zn), % 0 to 0.25
20 to 27
Residuals, % 0
0 to 0.9