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C18700 Copper vs. C61300 Bronze

Both C18700 copper and C61300 bronze are copper alloys. They have a moderately high 90% of their average alloy composition in common.

For each property being compared, the top bar is C18700 copper and the bottom bar is C61300 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 9.0 to 9.6
34 to 40
Poisson's Ratio 0.34
0.34
Shear Modulus, GPa 43
43
Shear Strength, MPa 170 to 190
370 to 390
Tensile Strength: Ultimate (UTS), MPa 290 to 330
550 to 580
Tensile Strength: Yield (Proof), MPa 230 to 250
230 to 310

Thermal Properties

Latent Heat of Fusion, J/g 210
220
Maximum Temperature: Mechanical, °C 200
210
Melting Completion (Liquidus), °C 1080
1050
Melting Onset (Solidus), °C 950
1040
Specific Heat Capacity, J/kg-K 380
420
Thermal Conductivity, W/m-K 380
55
Thermal Expansion, µm/m-K 17
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 98
12
Electrical Conductivity: Equal Weight (Specific), % IACS 99
13

Otherwise Unclassified Properties

Base Metal Price, % relative 30
29
Density, g/cm3 9.0
8.5
Embodied Carbon, kg CO2/kg material 2.6
3.0
Embodied Energy, MJ/kg 41
49
Embodied Water, L/kg 310
370

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 29
150 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 240 to 280
230 to 410
Stiffness to Weight: Axial, points 7.1
7.5
Stiffness to Weight: Bending, points 18
19
Strength to Weight: Axial, points 9.0 to 10
18 to 19
Strength to Weight: Bending, points 11 to 12
18
Thermal Diffusivity, mm2/s 110
15
Thermal Shock Resistance, points 10 to 12
19 to 20

Alloy Composition

Aluminum (Al), % 0
6.0 to 7.5
Copper (Cu), % 98 to 99.2
88 to 91.8
Iron (Fe), % 0
2.0 to 3.0
Lead (Pb), % 0.8 to 1.5
0 to 0.010
Manganese (Mn), % 0
0 to 0.2
Nickel (Ni), % 0
0 to 0.15
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0
0 to 0.1
Tin (Sn), % 0
0.2 to 0.5
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.2