Topics CoveredIntroductionChemical CompositionPhysical PropertiesMechanical PropertiesOther DesignationsFabrication and Heat Treatment Machinability Welding Forging Hot Working Cold Working AnnealingApplications
Unalloyed copper or oxygen free coppers have good corrosion resistance and high thermal and electrical properties. Unalloyed coppers of different grades vary based on the amount of impurities present, and have different characteristics. UNS designations of commercially available pure copper are C10100 to C13000. These oxygen free coppers are suitable for applications, which require ductility and high conductivity.
The following section will discuss in detail about UNS C10100 oxygen free copper.
The following table shows the chemical composition of UNS C10100 copper.
The physical properties of UNS C10100 copper are given in the following table.
||8.89 - 8.94 g/cm3
||0.321 - 0.323 lb/in3|
The mechanical properties of UNS C10100 copper are tabulated below.
|Hardness, Vickers (½ hard)
||75.0 - 90.0
||75.0 - 90.0|
|Hardness, Vickers (full hard)
||90.0 - 105
||90.0 - 105|
|Tensile strength, ultimate (varies with heat treatment)
||221 - 455 MPa
||32100 - 66000 psi|
|Tensile strength, yield (varies widely with heat treatment)
||69.0 - 365 MPa
||10000 - 52900 psi|
|Elongation at break (in 101.6 mm (4 in.))
|Modulus of elasticity
|Machinability (UNS C36000 (free-cutting brass) = 100%)
The designations that are equivalent to UNS C10100 copper are outlined in the following table.
Fabrication and Heat Treatment
The machinability rate of C10100 copper is 20%.
Welding methods such as soldering, brazing, gas shielded arc welding, oxyacetylene welding and butt welding are recommended for C10100 copper. Other welding methods such as coated metal arc welding, spot welding and seam welding are not preferred.
C10100 copper is forged at hot working temperatures ranging from 760 to 871°C (1400 to 1600°F). The hot forgeability rate of this metal is 65%.
C10100 copper has excellent hot working property.
C10100 copper has excellent cold working property.
Annealing of C10100 copper is performed at temperatures ranging from 371 to 649°C (700 to 1200°F).
The following are the major applications of UNS C10100 copper:
- Electrical and electronic conductors
- Wave guides
- Cavity resonators
- Superconductor matrixes
- Vacuum tube and solid-state devices
- Glass-to-metal seals