Sep 18 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesMechanical PropertiesOther DesignationsFabrication and Heat Treatment Machinability Welding Heat Treatment
Introduction
Pure copper has good electrical and thermal conductivity. More than 400 varieties of copper alloys are available. Alloys can be freely formed by copper than most metals.
The following datasheet gives details about UNS C91000 copper casting alloy.
Chemical Composition
The following table shows chemical composition of UNS C91000 copper alloy.
| Element |
Content (%) |
| Cu |
85 |
| Sn |
14 |
| Zn |
1 |
Physical Properties
The physical properties of UNS C91000 copper alloy are tabulated below.
| Properties |
Metric |
Imperial |
| Density |
8.71 g/cm3 |
0.315 lb/in³ |
Mechanical Properties
The mechanical properties of UNS C91000 copper alloy are outlined in the following table.
| Properties |
Metric |
Imperial |
| Hardness, Brinell (500 kg) |
105 |
105 |
| Tensile strength ( as cast) |
221 MPa |
32100 psi |
| Yield strength (as cast) |
172 MPa |
24900 psi |
| Elongation at break (as cast) |
2% |
2% |
| Machinability (UNS C36000 (free-cutting brass) = 100) |
20 |
20 |
| Poisson's ratio |
0.34 |
0.34 |
| Elastic modulus |
117 GPa |
17000 ksi |
Other Designations
Other designations that are equivalent to UNS C91000 copper alloy include:
- ASTM B30
- ASTM B505
- QQ C390
Fabrication and Heat Treatment
Machinability
The machinability rating of UNS C91000 copper alloy is 20.
Welding
UNS C91000 copper alloy can be welded using brazing, soldering, carbon arc welding, oxyacetylene welding, coated metal arc welding, and gas shielded arc welding methods.
Heat Treatment
UNS C91000 copper alloy can be stress relieved at 260°C (500°F). The time taken for stress relieving is 1 hr/in. of section thickness. It does not respond to heat treatment.