Nov 13 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesOther DesignationsFabrication and Heat Treatment Machinability Welding Forging Hot Working Cold Working AnnealingApplications
Introduction
Unalloyed coppers have high electrical and thermal conductivity as well as high resistance to corrosion. The UNS numbers C10100 to C13000 are used to denote commercially pure copper. The behavior of different grades of unalloyed copper varies with the amount of impurities present in it. Oxygen-free coppers are used for applications that require high conductivity and exceptional ductility.
The following data sheet discusses in detail about oxygen free extra low phosphorus copper UNS C10300.
Chemical Composition
The following table shows the chemical composition of UNS C10300 oxygen free copper.
| Element |
Content (%) |
| Cu |
99.95 |
| P |
0.005 |
Physical Properties
The physical properties of UNS C10300 oxygen free copper are given in the following table.
| Properties |
Metric |
Imperial |
| Density |
8.8 - 8.94 g/cm³ |
0.317 - 0.323 lb/in3 |
| Melting point |
1083°C |
1981°F |
Other Designations
Other designations that are equivalent to UNS C10300 oxygen free copper include the following.
| ASTM B111 |
ASTM B306 |
ASTM B638 |
ASTM B75 |
| ASTM B133 |
ASTM B359 |
ASTM B640 |
ASTM B88 |
| ASTM B152 |
ASTM B372 |
ASTM B641 |
MIL B-20292 |
| ASTM B187 |
ASTM B379 |
ASTM B68 |
MIL T-3235 |
| ASTM B188 |
ASTM B395 |
ASTM B687 |
UNS C10300 |
| ASTM B224 |
ASTM B42 |
ASTM B698 |
|
| ASTM B280 |
ASTM B432 |
ASTM B716 |
|
| ASTM B302 |
ASTM B447 |
ASTM B743 |
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Fabrication and Heat Treatment
Machinability
UNS C10300 copper has a machinability rate of 20%.
Welding
Following are the recommended welding methods for UNS C10300 copper:
- Soldering – excellent
- Brazing – excellent
- Oxyacetylene welding – fair
- Gas shielded arc welding – excellent
- Coated metal arc welding – recommended
- Spot welding - not recommended
- Seam welding - not recommended
- Butt welding - good
Forging
UNS C10300 copper is forged at hot working temperature between 760 to 871°C (1400 to 1600°F). The hot forgeability rate of this metal is 65%.
Hot Working
UNS C10300 copper has excellent hot working property.
Cold Working
UNS C10300 copper has good cold working property.
Annealing
Annealing of UNS C10300 copper is performed at temperature between 371 and 649°C (700 and 1200°F).
Applications
The following are the major applications of UNS C10300 oxygen free copper:
- Electrical and electronic conductors
- Wave guides
- Cavity resonators
- Superconductor matrixes
- Vacuum tube and solid-state devices
- Glass-to-metal seals