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2018 Aluminum vs. C42500 Brass

2018 aluminum belongs to the aluminum alloys classification, while C42500 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 2018 aluminum and the bottom bar is C42500 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
110
Elongation at Break, % 9.6
2.0 to 49
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 27
42
Shear Strength, MPa 270
220 to 360
Tensile Strength: Ultimate (UTS), MPa 420
310 to 630
Tensile Strength: Yield (Proof), MPa 310
120 to 590

Thermal Properties

Latent Heat of Fusion, J/g 390
200
Maximum Temperature: Mechanical, °C 220
180
Melting Completion (Liquidus), °C 640
1030
Melting Onset (Solidus), °C 510
1010
Specific Heat Capacity, J/kg-K 870
380
Thermal Conductivity, W/m-K 150
120
Thermal Expansion, µm/m-K 22
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
28
Electrical Conductivity: Equal Weight (Specific), % IACS 120
29

Otherwise Unclassified Properties

Base Metal Price, % relative 11
30
Density, g/cm3 3.1
8.7
Embodied Carbon, kg CO2/kg material 8.1
2.8
Embodied Energy, MJ/kg 150
46
Embodied Water, L/kg 1130
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37
12 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 670
64 to 1570
Stiffness to Weight: Axial, points 13
7.1
Stiffness to Weight: Bending, points 45
18
Strength to Weight: Axial, points 38
9.9 to 20
Strength to Weight: Bending, points 41
12 to 19
Thermal Diffusivity, mm2/s 57
36
Thermal Shock Resistance, points 19
11 to 22

Alloy Composition

Aluminum (Al), % 89.7 to 94.4
0
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.5 to 4.5
87 to 90
Iron (Fe), % 0 to 1.0
0 to 0.050
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 0.45 to 0.9
0
Manganese (Mn), % 0 to 0.2
0
Nickel (Ni), % 1.7 to 2.3
0
Phosphorus (P), % 0
0 to 0.35
Silicon (Si), % 0 to 0.9
0
Tin (Sn), % 0
1.5 to 3.0
Zinc (Zn), % 0 to 0.25
6.1 to 11.5
Residuals, % 0 to 0.15
0 to 0.5