Sep 13 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesMechanical PropertiesOther DesignationsFabrication and Heat Treatment Machinability Welding Forging Hot Working Cold Working AnnealingApplications
Introduction
UNS C17000 beryllium copper alloys are ductile, heat treatable and can be mill hardened. These alloys are used in applications, which require high strength and good conductivity. The following section will discuss in detail about UNS C17000 beryllium copper alloys.
Chemical Composition
The following table shows the chemical composition of UNS C17000 copper.
| Element |
Content (%) |
| Cu |
98.1 |
| Be |
1.7 |
| Co |
0.20 |
Physical Properties
The physical properties of UNS C17000 copper are given in the following table.
| Properties |
Metric |
Imperial |
| Density |
8.26 g/cm3 |
0.298 lb/in3 |
| Melting point |
866°C |
1590°F |
Mechanical Properties
The mechanical properties of UNS C17000 copper are tabulated below.
| Properties |
Metric |
Imperial |
| Tensile strength, ultimate |
483 - 810 MPa |
70100 - 117000 psi |
| Tensile strength, yield (depending on temper) |
221 - 1172 MPa |
32100 - 170000 psi |
| Elongation at break (in 76.2 mm) |
45.0% |
45.0% |
| Modulus of elasticity |
115 GPa |
16700 ksi |
| Poissons ratio |
0.300 |
0.300 |
| Machinability (UNS C36000 (free-cutting brass) = 100%) |
20% |
20% |
| Shear modulus |
50.0 GPa |
7250 ksi |
Other Designations
Other designations that are equivalent to UNS C17000 copper include:
- ASTM B194
- ASTM B196
- ASTM B570
- SAE J461
- SAE J463
Fabrication and Heat Treatment
Machinability
The machinability rating of C17000 copper alloys is 20%.
Welding
Welding methods such as soldering, brazing, gas shielded arc welding, coated metal arc welding, spot welding, seam welding and butt welding are preferred for C17000 copper alloys. Oxyacetylene welding is not recommended for this type of alloys.
Forging
C17000 copper alloys are forged at temperature ranging from 649 to 816°C (1200 to 1500°F).
Hot Working
C17000 copper alloys have good hot working property.
Cold Working
C17000 copper alloys have excellent cold working property.
Annealing
C17000 copper alloys are annealed at temperature ranging from 774 to 802°C (1425 to 1475°F).
Applications
The following are the major applications of the UNS C17000 copper:
- Electrical/electronic connectors
- Current-carrying springs
- Precision screw machined parts
- Welding electrodes
- Bearings
- Plastic molds
- Corrosion resistant components