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C18700 Copper vs. C67000 Bronze

Both C18700 copper and C67000 bronze are copper alloys. They have 66% of their average alloy composition in common.

For each property being compared, the top bar is C18700 copper and the bottom bar is C67000 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 9.0 to 9.6
5.6 to 11
Poisson's Ratio 0.34
0.31
Shear Modulus, GPa 43
42
Shear Strength, MPa 170 to 190
390 to 510
Tensile Strength: Ultimate (UTS), MPa 290 to 330
660 to 880
Tensile Strength: Yield (Proof), MPa 230 to 250
350 to 540

Thermal Properties

Latent Heat of Fusion, J/g 210
190
Maximum Temperature: Mechanical, °C 200
160
Melting Completion (Liquidus), °C 1080
900
Melting Onset (Solidus), °C 950
850
Specific Heat Capacity, J/kg-K 380
410
Thermal Conductivity, W/m-K 380
99
Thermal Expansion, µm/m-K 17
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 98
22
Electrical Conductivity: Equal Weight (Specific), % IACS 99
25

Otherwise Unclassified Properties

Base Metal Price, % relative 30
23
Density, g/cm3 9.0
7.9
Embodied Carbon, kg CO2/kg material 2.6
2.9
Embodied Energy, MJ/kg 41
49
Embodied Water, L/kg 310
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 29
43 to 62
Resilience: Unit (Modulus of Resilience), kJ/m3 240 to 280
560 to 1290
Stiffness to Weight: Axial, points 7.1
7.8
Stiffness to Weight: Bending, points 18
20
Strength to Weight: Axial, points 9.0 to 10
23 to 31
Strength to Weight: Bending, points 11 to 12
21 to 26
Thermal Diffusivity, mm2/s 110
30
Thermal Shock Resistance, points 10 to 12
21 to 29

Alloy Composition

Aluminum (Al), % 0
3.0 to 6.0
Copper (Cu), % 98 to 99.2
63 to 68
Iron (Fe), % 0
2.0 to 4.0
Lead (Pb), % 0.8 to 1.5
0 to 0.2
Manganese (Mn), % 0
2.5 to 5.0
Tin (Sn), % 0
0 to 0.5
Zinc (Zn), % 0
21.8 to 32.5
Residuals, % 0
0 to 0.5

Comparable Variants