Sep 13 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesMechanical PropertiesOther DesignationsFabrication and Heat treatment Annealing Cold Working Hot Working Welding Forging MachinabilityApplications
Introduction
UNS 11500 silver-bearing tough pitch copper alloys are anneal resistant and ductile. These alloys have conductivity 101% IACS.
The datasheet given below highlights the chemical composition, physical and mechanical properties, other designations, fabrication and heat treatment and applications of UNS 11500 silver-bearing tough pitch copper alloys.
Chemical Composition
The chemical composition of UNS 11500 copper alloys is outlined in the following table.
| Element |
Content (%) |
| Cu |
99.90 |
| O |
0.04 |
| Ag |
0.05 |
Physical Properties
The following table shows the physical properties of UNS 11500 copper alloys.
| Properties |
Metric |
Imperial |
| Density |
8.89-8.94 g/cm3 |
0.321-0.323 lb/in3 |
Mechanical Properties
The mechanical properties of UNS 11500 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 11500 copper alloys are given in the table below:
| ASTM B1 |
ASTM B189 |
ASTM B229 |
ASTM B3 |
ASTM B470 |
ASTM B8 |
| ASTM B116 |
ASTM B2 |
ASTM B246 |
ASTM B33 |
ASTM B49 |
QQ B575 |
| ASTM B172 |
ASTM B224 |
ASTM B272 |
ASTM B355 |
ASTM B496 |
QQ W343 |
| ASTM B173 |
ASTM B226 |
ASTM B286 |
ASTM B442 |
ASTM B5 |
SAE J461 |
| ASTM B174 |
ASTM B228 |
ASTM B298 |
ASTM B47 |
ASTM B623 |
SAE J463 |
Fabrication and Heat treatment
Annealing
UNS 11500 copper alloys are annealed between 482 and 760°C (900 and 1400°F).
Cold Working
UNS 11500 copper alloys can be cold worked in an excellent manner.
Hot Working
UNS 11500 copper alloys can be hot formed in an excellent manner.
Welding
Welding methods such oxyacetylene welding, coated metal arc welding, seam welding and spot welding are not recommended for UNS 11500 copper alloys. Butt welding, Soldering, brazing and gas shielded arc welding can be performed on these alloys.
Forging
Temperatures between 760 and 871°C (1400 and 1600°F) are used for forging the UNS 11500 copper alloys whose hot forgeability rating is 65%.
Machinability
The machinability rating of UNS 11500 copper alloys is 20%.
Applications
UNS 11500 copper alloys are used for commutator segments and electrical components.