Nov 15 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Other Designations
Fabrication and Heat Treatment
Machinability
Welding
Forging
Hot Working
Cold Working
Annealing
Applications
Introduction
Pure and unalloyed coppers have good corrosion resistance and high thermal and electrical conductivity. Pure copper is designated as UNS C10100 to C13000. Oxygen free coppers are applicable in all applications, which require high ductility and conductivity. Impurities present in different grades of unalloyed copper vary from each other.
Chemical Composition
The chemical composition of the UNS C10700 copper is outlined in the following table.
|
Element |
Content (%) |
|
Cu |
99.95 |
|
Ag |
0.07813 |
Physical Properties
The physical properties of the UNS C10700 copper are given below.
|
Properties |
Metric |
Imperial |
|
Density |
8.94 g/cm3 |
0.323 lb/in3 |
|
Melting point |
1083°C |
1981°F |
Mechanical Properties
The following table shows mechanical properties of the UNS C10700 copper.
|
Properties |
Metric |
Imperial |
|
Tensile strength, ultimate |
221 - 455 MPa |
32100 - 66000 psi |
|
Tensile strength, yield (depending on temper) |
69.0 - 365 MPa |
10000 - 52900 psi |
|
Elongation at break (in 101.6 mm (4 in.) |
55% |
55% |
|
Modulus of elasticity |
115 GPa |
16700 ksi |
|
Poisson’s ratio |
0.300 |
0.300 |
|
Machinability (UNS C36000 (free-cutting brass) = 100%) |
20% |
20% |
|
Shear modulus |
44.0 GPa |
6380 ksi |
Other Designations
Other designations that are equivalent to the UNS C10700 copper are listed in the following table.
|
ASME SB152 |
ASTM B188 |
ASTM B272 |
QQ B650 |
|
ASTM B1 |
ASTM B189 |
ASTM B298 |
ASTM B506 |
|
ASTM B133 |
ASTM B2 |
ASTM B3 |
MIL B-19231 |
|
ASTM B152 |
ASTM B224 |
ASTM B355 |
MIL B-20292 |
|
ASTM B187 |
ASTM B246 |
ASTM B49 |
MIL W-3318 |
Fabrication and Heat Treatment
Machinability
The machinability rate of the UNS C10700 copper is 20%.
Welding
Brazing, soldering, gas shielded arc welding, oxyacetylene welding, and butt welding are the methods recommended for welding the UNS C10700 copper. It is recommended that spot welding, coated metal arc welding, and seam welding methods are not used for welding the UNS C10700 copper.
Forging
The UNS C10700 copper can be forged at 760 to 871°C (1400 to 1600°F). Hot forgeability of this alloy is rated as 65%.
Hot Working
The UNS C10700 copper has excellent hot working capacity.
Cold Working
The UNS C10700 copper has excellent cold working capacity.
Annealing
The UNS C10700 copper can be annealed at 482 to 760°C (900 to 1400°F).
Applications
The UNS C10700 copper is most commonly used in electrical conductors, which are operated at high temperatures.