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C31400 Bronze vs. C70260 Copper

Both C31400 bronze and C70260 copper are copper alloys. They have 90% of their average alloy composition in common.

For each property being compared, the top bar is C31400 bronze and the bottom bar is C70260 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
120
Elongation at Break, % 6.8 to 29
9.5 to 19
Poisson's Ratio 0.33
0.34
Shear Modulus, GPa 42
44
Shear Strength, MPa 180 to 240
320 to 450
Tensile Strength: Ultimate (UTS), MPa 270 to 420
520 to 760
Tensile Strength: Yield (Proof), MPa 78 to 310
410 to 650

Thermal Properties

Latent Heat of Fusion, J/g 200
220
Maximum Temperature: Mechanical, °C 180
200
Melting Completion (Liquidus), °C 1040
1060
Melting Onset (Solidus), °C 1010
1040
Specific Heat Capacity, J/kg-K 380
390
Thermal Conductivity, W/m-K 180
160
Thermal Expansion, µm/m-K 18
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 42
40 to 50
Electrical Conductivity: Equal Weight (Specific), % IACS 43
40 to 51

Otherwise Unclassified Properties

Base Metal Price, % relative 29
31
Density, g/cm3 8.8
8.9
Embodied Carbon, kg CO2/kg material 2.6
2.7
Embodied Energy, MJ/kg 42
43
Embodied Water, L/kg 310
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 26 to 59
46 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 28 to 420
710 to 1810
Stiffness to Weight: Axial, points 7.1
7.3
Stiffness to Weight: Bending, points 18
18
Strength to Weight: Axial, points 8.7 to 13
16 to 24
Strength to Weight: Bending, points 11 to 14
16 to 21
Thermal Diffusivity, mm2/s 54
45
Thermal Shock Resistance, points 9.6 to 15
18 to 27

Alloy Composition


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Copper (Cu), % 87.5 to 90.5
95.8 to 98.8
Iron (Fe), % 0 to 0.1
0
Lead (Pb), % 1.3 to 2.5
0
Nickel (Ni), % 0 to 0.7
1.0 to 3.0
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0
0.2 to 0.7
Zinc (Zn), % 5.8 to 11.2
0
Residuals, % 0 to 0.4
0 to 0.5