Copper, Cu; Annealed
Categories: Metal; Nonferrous Metal; Copper Alloy; Pure Element

Material Notes: Annealed applies only to tensile and/or hardness values; other property values are typical of the element. This entry is for pure Cu, MatWeb also has entries for many alloys.

In general, copper alloys exhibit good to excellent corrosion resistance and high thermal conductivity and very high electrical conductivity. Pure copper's electrical conductivity is so high that many metals are measured against it in the form of the IACS (International Annealed Copper Standard). Applications include architectural uses, coinage, condenser/heat exchangers, plumbing, radiator cores, musical instruments, locks, fasteners, hinges, ammunition components, and electrical connectors. Small amounts of alloying elements are often added to copper to improve certain characteristics. Alloying can increase or reduce the strength, hardness, electrical and thermal conductivity, corrosion resistance, or change the color. Common primary alloying elements include tin (resulting in bronze) or zinc (resulting in brass).

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Physical PropertiesMetricEnglishComments
Density  7.764 g/cc
@Temperature 1300 °C
0.2805 lb/in³
@Temperature 2370 °F
 7.846 g/cc
@Temperature 1200 °C
0.2835 lb/in³
@Temperature 2190 °F
 7.924 g/cc
@Temperature 1100 °C
0.2863 lb/in³
@Temperature 2010 °F
 7.94 g/cc
@Temperature 1083.6 °C
0.287 lb/in³
@Temperature 1982.5 °F
 8.93 g/cc
@Temperature 20.0 °C
0.323 lb/in³
@Temperature 68.0 °F
Chemical PropertiesMetricEnglishComments
Atomic Mass 65.54665.5461995
Atomic Number 2929
Thermal Neutron Cross Section 3.8 barns/atom3.8 barns/atom
X-ray Absorption Edge 1.38 Å1.38 ÅK
 11.269 Å11.269 ÅLI
 12.994 Å12.994 ÅLII
 13.2578 Å13.2578 ÅLIII
Electrode Potential -0.520 V-0.520 Vmonovalent
 -0.340 V-0.340 Vdivalent
Electronegativity 1.91.9Pauling
Ionic Radius 0.720 Å0.720 ÅCrystal Ionic Radius for Valence +2
 0.960 Å0.960 ÅCrystal Ionic Radius for Valence +1
Electrochemical Equivalent 1.185 g/A/h1.185 g/A/hdivalent
 2.38 g/A/h2.38 g/A/hmonovalent
Mechanical PropertiesMetricEnglishComments
Hardness, Vickers 5050
Tensile Strength, Ultimate 210 MPa30500 psi
Tensile Strength, Yield 33.3 MPa4830 psi
Elongation at Break 60 %60 %
Modulus of Elasticity 110 GPa16000 ksi
Bulk Modulus 140 GPa20300 ksi
Poissons Ratio 0.3430.343
Shear Modulus 46.0 GPa6670 ksi
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.00000170 ohm-cm0.00000170 ohm-cm
Magnetic Susceptibility -8.00e-8-8.00e-8cgs/g
Thermal PropertiesMetricEnglishComments
Heat of Fusion 204.8 J/g88.10 BTU/lb
Heat of Vaporization 5234 J/g2252 BTU/lb
CTE, linear  16.4 µm/m-°C
@Temperature 20.0 - 100 °C
9.11 µin/in-°F
@Temperature 68.0 - 212 °F
 18.5 µm/m-°C
@Temperature 250 °C
10.3 µin/in-°F
@Temperature 482 °F
 20.2 µm/m-°C
@Temperature 500 °C
11.2 µin/in-°F
@Temperature 932 °F
 24.8 µm/m-°C
@Temperature 925 °C
13.8 µin/in-°F
@Temperature 1700 °F
Specific Heat Capacity 0.385 J/g-°C0.0920 BTU/lb-°F
Thermal Conductivity 385 W/m-K2670 BTU-in/hr-ft²-°F
 357 W/m-K
@Temperature 727 °C
2480 BTU-in/hr-ft²-°F
@Temperature 1340 °F
 398 W/m-K
@Temperature 27.0 °C
2760 BTU-in/hr-ft²-°F
@Temperature 80.6 °F
 401 W/m-K
@Temperature 0.000 °C
2780 BTU-in/hr-ft²-°F
@Temperature 32.0 °F
 483 W/m-K
@Temperature -173 °C
3350 BTU-in/hr-ft²-°F
@Temperature -279 °F
 10500 W/m-K
@Temperature -253 °C
72900 BTU-in/hr-ft²-°F
@Temperature -423 °F
 19600 W/m-K
@Temperature -263 °C
136000 BTU-in/hr-ft²-°F
@Temperature -441 °F
Melting Point 1083.2 - 1083.6 °C1981.8 - 1982.5 °F
Boiling Point 2562 °C4644 °F
Optical PropertiesMetricEnglishComments
Emissivity (0-1) 0.15
@Wavelength >=655 nm,
Temperature 807 °C
@Wavelength >=655 nm,
Temperature 1480 °F
Reflection Coefficient, Visible (0-1) 0.630.63
Component Elements PropertiesMetricEnglishComments
Copper, Cu 100 %100 %
Descriptive Properties
CAS Number7440-50-8

References for this datasheet.

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