Nov 15 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication and Heat Treatment
Machinability
Welding
Forging
Hot Working
Cold Working
Annealing
Applications
Introduction
Pure coppers are designated as UNS C10100 to C13000. Pure and unalloyed coppers have high corrosion resistance, and good electrical and thermal conductivity. Impurities present in different grades of unalloyed copper are different from each other. Oxygen free coppers are mainly applied in most of the applications that require high ductility and conductivity.
Chemical Composition
The following table shows chemical composition of UNS C10200 coppers.
|
Element |
Content (%) |
|
Cu |
99.95 |
Physical Properties
The physical properties of UNS C10200 coppers are given in the following table.
|
Properties |
Metric |
Imperial |
|
Density |
8.90 g/cm3 |
0.322 lb/in3 |
|
Melting point |
1083°C |
1981°F |
Mechanical Properties
The mechanical properties of UNS C10200 coppers are tabulated below.
|
Properties |
Metric |
Imperial |
|
Hardness, Vickers (½ hard) |
75 - 90 |
75- 90 |
|
Hardness, Vickers ( full hard) |
90 - 105 |
90 - 105 |
|
Tensile strength, ultimate (soft) |
215 - 254 MPa |
31200 - 36800 psi |
|
Tensile strength, ultimate ( hard) |
261 - 441 MPa |
37900 - 64000 psi |
|
Tensile strength, yield (@ strain 0.100%, varies with temper and cold work) |
49.0 - 78.0 MPa |
7110 - 11300 psi |
|
Elongation at break |
35 - 55% |
35 - 55% |
|
Modulus of elasticity |
117 GPa |
17000 ksi |
|
Poisson’s ratio |
0.31 |
0.31 |
|
Izod impact (type of Impact test unknown. Range reflects both soft and hard tempers) |
34 - 61J |
25.1 - 45 ft-lb |
|
Fatigue strength (test specimen: annealed 25 mm diam. Rod) |
67 MPa |
9720 psi |
|
Machinability (based on 100% machinability for BS2874 CZ 121 free-machining brass (20% of 100% for UNS C360000) |
20% |
20% |
|
Shear modulus |
44 GPa |
6380 ksi |
Thermal Properties
The thermal properties of UNS C10200 coppers are outlined in the following table.
|
Properties |
Metric |
Imperial |
|
CTE, linear (@ 20.0 - 100°C/ 68.0 - 212°F) |
17.0 μm/m°C |
9.44 μin/in°F |
|
CTE, linear (@ 20.0 - 200 °C/ 68.0 - 392°F) |
17.3 μm/m°C |
9.61 μin/in°F |
|
CTE, linear (@ 20.0 - 300°C/ 68.0 - 572°F) |
17.7 μm/m°C |
9.83 μin/in°F |
|
Specific heat capacity (@ 20.0 °C/ 68.0°F) |
0.385 J/g°C |
0.0920 BTU/lb°F |
|
Thermal conductivity (@ 20.0°C/ 68.0°F) |
383 - 391 W/m-K |
2660 - 2710 BTU-in/hr-ft2 °F |
Other Designations
Other designations that are equivalent to UNS C10200 coppers are listed in the following table.
|
AMS 4701 |
ASTM B173 |
ASTM B298 |
ASTM B48 |
ASTM B738 |
|
ASME SB111 |
ASTM B174 |
ASTM B3 |
ASTM B49 |
ASTM B743 |
|
ASME SB133 |
ASTM B187 |
ASTM B33 |
ASTM B496 |
ASTM B75 |
|
ASME SB359 |
ASTM B188 |
ASTM B355 |
ASTM B506 |
ASTM B8 |
|
ASME SB395 |
ASTM B189 |
ASTM B359 |
ASTM B556 |
ASTM B88 |
|
ASME SB42 |
ASTM B2 |
ASTM B372 |
ASTM B638 |
ASTM F9 |
|
ASME SB75 |
ASTM B224 |
ASTM B395 |
ASTM B640 |
MIL B-18907 |
|
ASTM B1 |
ASTM B226 |
ASTM B42 |
ASTM B641 |
MIL T-24107 |
|
ASTM B111 |
ASTM B246 |
ASTM B432 |
ASTM B68 |
MIL W-6712 |
|
ASTM B133 |
ASTM B272 |
ASTM B447 |
ASTM B687 |
MIL W-85 |
|
ASTM B152 |
ASTM B280 |
ASTM B451 |
ASTM B698 |
QQ B575 |
|
ASTM B172 |
ASTM B286 |
ASTM B470 |
ASTM B716 |
SAE J461 |
|
SAE J463 |
|
|
|
|
Fabrication and Heat Treatment
Machinability
The machinability rate of UNS C10200 coppers is about 20%.
Welding
Oxyacetylene welding, brazing, gas shielded arc welding, butt welding, and soldering are most commonly used methods for welding UNS C10200 coppers. It is suggested that seam welding, coated metal arc welding, and spot welding methods are not used for welding these alloys.
Forging
UNS C10200 coppers can be forged at a temperature of about 760 to 871°C (1400 to1600°F). Hot forgeability of UNS C10200 coppers is about 65%.
Hot Working
UNS C10200 oxygen free coppers have excellent hot working capacity.
Cold Working
UNS C10200 oxygen free coppers have excellent cold working capacity.
Annealing
UNS C10200 coppers can be annealed at 371 to 649°C (700 to 1200°F).
Applications
UNS C10200 oxygen free coppers are used in the following applications:
-
Electrical and electronic conductors
-
Cavity resonators
-
Superconductor matrixes
-
Glass-to-metal seals
-
Vacuum tube and solid-state devices
-
Wave guides