C18200 Chromium Copper Material Properties
The following data is provided for informational purposes only. It was provided with permission by the Copper Development Association at www.copper.org.
Last Update: Jan 10, 2007
Chemical Compostion
(%max., unless shown as range or min.)
| CU (1) | CR | FE | PB | SI | |
|---|---|---|---|---|---|
|
Min./Max. |
REM. |
0.6-1.2 |
0.10 |
0.05 |
0.10 |
|
Nominal |
99.1 |
0.9 |
– |
– |
– |
(1) Cu value includes Ag.
Note: Cu + Sum of Named Elements, 99.5% min.
Applicable Specifications
| Product | Specification |
|---|---|
|
Forgings |
MILITARY MIL–C–19311 |
Common Fabrication Processes
Bending, Cold working, Drawing, Extruding, Forging, Heading, Hot working, Impacting, Rolling, Swaging
Fabrication Properties
| Joining Technique | Suitability |
|---|---|
|
Soldering |
Good |
|
Brazing |
Good |
|
Oxyacetylene Welding |
Not Recommended |
|
Gas Shield Arc Welding |
Good |
|
Coated Metal Arc Welding |
Not Recommended |
|
Spot Weld |
Not Recommended |
|
Seam Weld |
Not Recommended |
|
Butt Weld |
Fair |
|
Capacity for being Cold Worked |
Excellent |
|
Capacity for being Hot Formed |
Good |
|
Forgeability Rating |
80 |
|
Machineability Rating |
20 |
Physical Properties
| US Customary | Metric | |
|---|---|---|
|
Melting Point - Liquids |
1967 F |
1075 C |
|
Melting Point - Solidus |
1958 F |
1070 C |
|
Density |
0.321 LB/IN3 @ 68 F |
8.89 GM/CM3 @ 20 C |
|
Specific Gravity |
8.89 |
8.89 |
|
Electrical Resistivity * |
13.0 OHMS–CMIL/FT @ 68 F |
2.16 MICROHM–CM @ 20 C |
|
Electrical Conductivity * |
80% ACS @ 68 F |
0.468 MEGASIEMENS/CM @ 20 C |
|
Thermal Conductivity * |
187.0 BTU · FT/(HR · FT2·OF) @ 68 F |
323.6 W/M · OK AT 20 C |
|
Coefficient of Thermal Expansion |
9.8 ·10–6 PER OF (68–572 F) |
17.6 ·10–6 PER OC (20–100 C)
|
|
Specific Heat Capacity |
0.092 BTU/LB/OF @ 68 F |
385.5 J/KG · OK AT 293 K |
|
Modulas of Elasticity in Tension |
17000 KSI |
117000 MPa |
|
Modulas of Rigidity |
7200 KSI |
49640 MPA |
* Solution heat treated, cold worked (50% minimum) and aged.
Tempers Most Commonly Used
| Flat Products | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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|
Bar, Drawn |
M20 |
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|
Plate |
TB00, TD01, TH01
|
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Typical Uses
Consumer
Pencil–type & Light Soldering Guns: Tips, Rod Extensions
Electrical
Switch Contacts, Electric Motor and Generator Components, Contacts, Wire, High Temperature, Semi Conductor Bases, Parts for Electronic Devices, Cable, Connectors, Thermal Conductors Requiring Greater Strength than Copper, Switch Gears, Electrical Connectors, Electrical Conductors Requiring Greater Strength than Copper, Arcing and Bridging Parts, Circuit Breaker Parts, Electron Tube Grid Side Rods
Industrial
Seam Welding Wheels, Electrode Holder Jaws, Flash Welding Electrodes, Plastic Mold Components, Resistance Welding Machine Electrodes, Flash Welding Electrodes, Current Carrying Shafts and Arms, Wear Plates on Heavy Equipment, Heat Sinks, Structural Parts, Spot Welding Tips, Molds