Nov 13 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesMechanical PropertiesOther DesignationsFabrication and Heat Treatment Annealing Cold Working Hot Working Welding Forging MachinabilityApplications
Introduction
UNS numbers C10100 to C13000 indicate the types of pure copper. Pure and unalloyed copper has excellent corrosion resistance and high thermal and electrical conductivity. Unalloyed copper grades vary in the amount of impurities, and hence act in a different manner. The purity of metal is highly important as most alloying elements are quite harmful to the electrical conductivity of copper.
The datasheet given below will highlight the chemical composition, physical and mechanical properties, other designations, fabrication and heat treatment and applications of UNS C10500 oxygen free silver-bearing copper alloys.
Chemical Composition
The chemical composition of UNS C10500 copper alloys is outlined in the following table.
| Element |
Content (%) |
| Cu |
99.95 |
| Ag |
0.03125 |
Physical Properties
The following table shows the physical properties of UNS C10500 copper alloys.
| Properties |
Metric |
Imperial |
| Density (UNS C10700) |
8.94 g/cm3 |
0.323 lb/in3 |
| Melting point |
1083°C |
1981°F |
Mechanical Properties
The mechanical properties of UNS C10500 copper alloys are displayed in the following table.
| 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.)) |
55.00% |
55.00% |
| Modulus of elasticity |
117 GPa |
16969 ksi |
| Poisson's ratio |
0.34 |
0.34 |
| Machinability (UNS C36000 (free-cutting brass) = 100%) |
20% |
20% |
| Shear modulus |
44.0 GPa |
6380 ksi |
Other Designations
Equivalent materials to UNS C10500 copper alloys are given in the table below.
| ASTM B133 |
ASTM B298 |
| ASTM B187 |
ASTM B355 |
| ASTM B189 |
ASTM B3 |
| ASTM B224 |
ASTM B49 |
| ASTM B1 |
ASTM B506 |
| ASTM B152 |
ASTM B188 |
| ASTM B2 |
ASTM B246 |
| ASME SB152 |
ASTM B272 |
|
|
Fabrication and Heat Treatment
Annealing
UNS C10500 oxygen free silver-bearing copper is annealed between 482 and 760°C (900 and 1400°F)
Cold Working
UNS C10500 oxygen free silver-bearing copper has excellent cold working capacity.
Hot Working
UNS C10500 alloys can be hot formed in an excellent manner.
Welding
Welding methods such as coated metal arc welding, seam welding and spot welding are not recommended for UNS C10500 alloys, whereas gas shielded arc welding and butt welding are good for these alloys. Brazing and soldering are considered as excellent processes for UNS C10500 alloys.
Forging
Temperatures between 760 and 871°C (1400 and 1600°F) are used for forging the UNS C10500 alloys whose hot forgeability rating is 65%.
Machinability
The machinability rating of UNS C10500 copper alloys is 20%.
Applications
UNS C10500 copper alloys are used for electrical conductors working at high temperatures, where softening of copper readily takes place.