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2218 Aluminum vs. C69300 Brass

2218 aluminum belongs to the aluminum alloys classification, while C69300 brass belongs to the copper alloys. There are 29 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 C69300 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
110
Elongation at Break, % 6.8 to 10
8.5 to 15
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 27
41
Shear Strength, MPa 210 to 250
330 to 370
Tensile Strength: Ultimate (UTS), MPa 330 to 430
550 to 630
Tensile Strength: Yield (Proof), MPa 260 to 310
300 to 390

Thermal Properties

Latent Heat of Fusion, J/g 390
240
Maximum Temperature: Mechanical, °C 220
160
Melting Completion (Liquidus), °C 640
880
Melting Onset (Solidus), °C 510
860
Specific Heat Capacity, J/kg-K 870
400
Thermal Conductivity, W/m-K 140
38
Thermal Expansion, µm/m-K 22
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 110
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 11
26
Density, g/cm3 3.1
8.2
Embodied Carbon, kg CO2/kg material 8.2
2.7
Embodied Energy, MJ/kg 150
45
Embodied Water, L/kg 1130
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27 to 31
47 to 70
Resilience: Unit (Modulus of Resilience), kJ/m3 450 to 650
400 to 700
Stiffness to Weight: Axial, points 13
7.4
Stiffness to Weight: Bending, points 45
19
Strength to Weight: Axial, points 30 to 39
19 to 21
Strength to Weight: Bending, points 34 to 41
18 to 20
Thermal Diffusivity, mm2/s 52
12
Thermal Shock Resistance, points 15 to 19
19 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
73 to 77
Iron (Fe), % 0 to 1.0
0 to 0.1
Lead (Pb), % 0
0 to 0.090
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.2
0 to 0.1
Nickel (Ni), % 1.7 to 2.3
0 to 0.1
Phosphorus (P), % 0
0.040 to 0.15
Silicon (Si), % 0 to 0.9
2.7 to 3.4
Tin (Sn), % 0
0 to 0.2
Zinc (Zn), % 0 to 0.25
18.4 to 24.3
Residuals, % 0
0 to 0.5