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C18700 Copper vs. C32000 Brass

Both C18700 copper and C32000 brass are copper alloys. They have 86% of their average alloy composition in common.

For each property being compared, the top bar is C18700 copper and the bottom bar is C32000 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 9.0 to 9.6
6.8 to 29
Poisson's Ratio 0.34
0.33
Shear Modulus, GPa 43
41
Shear Strength, MPa 170 to 190
180 to 280
Tensile Strength: Ultimate (UTS), MPa 290 to 330
270 to 470
Tensile Strength: Yield (Proof), MPa 230 to 250
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 950
990
Specific Heat Capacity, J/kg-K 380
380
Thermal Conductivity, W/m-K 380
160
Thermal Expansion, µm/m-K 17
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 98
36
Electrical Conductivity: Equal Weight (Specific), % IACS 99
37

Otherwise Unclassified Properties

Base Metal Price, % relative 30
28
Density, g/cm3 9.0
8.7
Embodied Carbon, kg CO2/kg material 2.6
2.6
Embodied Energy, MJ/kg 41
42
Embodied Water, L/kg 310
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 29
30 to 59
Resilience: Unit (Modulus of Resilience), kJ/m3 240 to 280
28 to 680
Stiffness to Weight: Axial, points 7.1
7.1
Stiffness to Weight: Bending, points 18
18
Strength to Weight: Axial, points 9.0 to 10
8.8 to 15
Strength to Weight: Bending, points 11 to 12
11 to 16
Thermal Diffusivity, mm2/s 110
47
Thermal Shock Resistance, points 10 to 12
9.5 to 16

Alloy Composition

Copper (Cu), % 98 to 99.2
83.5 to 86.5
Iron (Fe), % 0
0 to 0.1
Lead (Pb), % 0.8 to 1.5
1.5 to 2.2
Nickel (Ni), % 0
0 to 0.25
Zinc (Zn), % 0
10.6 to 15
Residuals, % 0
0 to 0.4

Comparable Variants