Jul 12 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication and Heat Treatment
Machinability
Welding
Heat Treatment
Applications
Introduction
Copper is easiy to mine and refine compared to many other metals. It has been in use for several thousand years. It can be obtained from the ores cupritemalachite, covellite, chalcocite, tenorite,and bornite. It finds use in electrical, marine, defense, construction, architecture, and jewelry sectors.
The following datasheet gives an overview of UNS C94500 copper alloy.
Chemical Composition
The following table shows the chemical composition of UNS C94500 copper alloy.
|
Element |
Content (%) |
|
Copper, Cu |
73 |
|
Lead, Pb |
16-2 |
|
Tin. Sn |
6-8 |
|
Zinc, Zn |
≤ 1.20 |
|
Nickel, Ni |
≤ 1.0 |
|
Antimony, Sb |
≤ 0.80 |
|
Phosphorus, P |
≤ 0.50 |
|
Iron,Fe |
≤ 0.15 |
|
Sulfur, S |
≤ 0.080 |
|
Silicon, Si |
≤ 0.0050 |
|
Aluminum, Al |
≤ 0.0050 |
Physical Properties
The physical properties of UNS C94500 copper alloy are tabulated below.
|
Properties |
Metric |
Imperial |
|
Density |
9.40 g/cm3 |
0.340 lb/in3 |
Mechanical Properties
The mechanical properties of UNS C94500 copper alloy are outlined in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
170 MPa |
24700 psi |
|
Yield strength |
83.0 MPa |
12000 psi |
|
Elongation at break (in 50 mm) |
12% |
12% |
|
Poisson's ratio |
0.34 |
0.34 |
|
Elastic modulus |
117 GPa |
17000 ksi |
|
Compressive strength |
250 MPa |
36300 psi |
|
Izod impact |
5.40 J |
3.98 ft-lb |
|
Fatigue strength (@# of cycles 1.00e+8, rotating beam) |
69 MPa |
10000 psi |
|
Hardness, Brinell |
50 |
50 |
|
Machinability (UNS C36000 (free-cutting brass) = 100) |
80 |
80 |
Thermal Properties
The thermal properties of UNS C94500 copper alloy are given in the following table.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@ 20-200°C/68- 392°F) |
18.5 µm/m°C |
10.3 µin/in°F |
|
Thermal conductivity (@ 20°C/68°F) |
52 W/mK |
361 BTU in/hr.ft2.°F |
Other Designations
Other designations that are equivalent to UNS C94500 copper alloy include:
Fabrication and Heat Treatment
Machinability
The machinability rate of UNS C94500 copper alloy is 80.
Welding
UNS C94500 copper alloy can be welded using soldering and brazing processes. Oxyacetylene welding, gas shielded arc welding, carbon arc welding, and coated metal arc welding are not used for welding this alloy.
Heat Treatment
UNS C94500 copper alloy can be stress relieved at the temperature of about 260°C (500°F). The time taken for stress relieving is about 1 hr/in. of section thickness. It does not respond to heat treatment.
Applications
UNS C94500 copper alloy can be mainly used in high-speed low-load bearings and locomotive wearing parts.