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C18900 Copper vs. C32000 Brass

Both C18900 copper and C32000 brass are copper alloys. They have 85% of their average alloy composition in common.

For each property being compared, the top bar is C18900 copper and the bottom bar is C32000 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
110
Elongation at Break, % 14 to 48
6.8 to 29
Poisson's Ratio 0.34
0.33
Shear Modulus, GPa 43
41
Shear Strength, MPa 190 to 300
180 to 280
Tensile Strength: Ultimate (UTS), MPa 260 to 500
270 to 470
Tensile Strength: Yield (Proof), MPa 67 to 390
78 to 390

Thermal Properties

Latent Heat of Fusion, J/g 210
190
Maximum Temperature: Mechanical, °C 200
170
Melting Completion (Liquidus), °C 1080
1020
Melting Onset (Solidus), °C 1020
990
Specific Heat Capacity, J/kg-K 390
380
Thermal Conductivity, W/m-K 130
160
Thermal Expansion, µm/m-K 17
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 30
36
Electrical Conductivity: Equal Weight (Specific), % IACS 30
37

Otherwise Unclassified Properties

Base Metal Price, % relative 31
28
Density, g/cm3 8.9
8.7
Embodied Carbon, kg CO2/kg material 2.7
2.6
Embodied Energy, MJ/kg 42
42
Embodied Water, L/kg 310
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 65 to 95
30 to 59
Resilience: Unit (Modulus of Resilience), kJ/m3 20 to 660
28 to 680
Stiffness to Weight: Axial, points 7.2
7.1
Stiffness to Weight: Bending, points 18
18
Strength to Weight: Axial, points 8.2 to 16
8.8 to 15
Strength to Weight: Bending, points 10 to 16
11 to 16
Thermal Diffusivity, mm2/s 38
47
Thermal Shock Resistance, points 9.3 to 18
9.5 to 16

Alloy Composition

Aluminum (Al), % 0 to 0.010
0
Copper (Cu), % 97.7 to 99.15
83.5 to 86.5
Iron (Fe), % 0
0 to 0.1
Lead (Pb), % 0 to 0.020
1.5 to 2.2
Manganese (Mn), % 0.1 to 0.3
0
Nickel (Ni), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.050
0
Silicon (Si), % 0.15 to 0.4
0
Tin (Sn), % 0.6 to 0.9
0
Zinc (Zn), % 0 to 0.1
10.6 to 15
Residuals, % 0
0 to 0.4

Comparable Variants