Nov 13 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesMechanical PropertiesOther DesignationsFabrication and Heat Treatment Machinability Welding Forging Hot Working Cold Working AnnealingApplications
Introduction
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.
Chemical Composition
The following table shows the chemical composition of UNS C10100 copper.
| Element |
Content (%) |
| Cu, Copper |
99.99 |
Physical Properties
The physical properties of UNS C10100 copper are given in the following table.
| Properties |
Metric |
Imperial |
| Density |
8.89 - 8.94 g/cm3 |
0.321 - 0.323 lb/in3 |
| Melting point |
1083°C |
1981°F |
Mechanical Properties
The mechanical properties of UNS C10100 copper are tabulated below.
| Properties |
Metric |
Imperial |
| 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.)) |
55.00% |
55.00% |
| Modulus of elasticity |
115 GPa |
16700 ksi |
| Poissons ratio |
0.310 |
0.310 |
| Machinability (UNS C36000 (free-cutting brass) = 100%) |
20% |
20% |
| Shear modulus |
44.0 GPa |
6380 ksi |
Other Designations
The designations that are equivalent to UNS C10100 copper are outlined in the following table.
| AMS 4700 |
ASTM B187 |
ASTM B286 |
ASTM B451 |
ASTM B75 |
| ASTM B1 |
ASTM B188 |
ASTM B298 |
ASTM B470 |
ASTM F68 |
| ASTM B111 |
ASTM B189 |
ASTM B3 |
ASTM B48 |
MIL B-18907 |
| ASTM B133 |
ASTM B2 |
ASTM B33 |
ASTM B49 |
MIL W-3318 |
| ASTM B152 |
ASTM B224 |
ASTM B355 |
ASTM B496 |
MIL W-85 |
| ASTM B172 |
ASTM B246 |
ASTM B359 |
ASTM B640 |
QQ B575 |
| ASTM B173 |
ASTM B272 |
ASTM B432 |
ASTM B641 |
QQ B650 |
| ASTM B174 |
ASTM B280 |
ASTM B447 |
ASTM B698 |
QQ W343 |
Fabrication and Heat Treatment
Machinability
The machinability rate of C10100 copper is 20%.
Welding
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.
Forging
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%.
Hot Working
C10100 copper has excellent hot working property.
Cold Working
C10100 copper has excellent cold working property.
Annealing
Annealing of C10100 copper is performed at temperatures ranging from 371 to 649°C (700 to 1200°F).
Applications
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