"MOFC" denotes oxygen-free copper manufactured by Mitsubishi Materials Corporation.
A metal containing 99.90% copper is called pure copper. We use two kinds of such metal in our extruded rod products - one is oxygen-free copper (MOFC-10200) and the other is tough-pitch copper (TC). Both have good electrical conductivity, thermal conductivity, cold workability, and forgeability.
The risk of hydrogen embrittlement (blowhole, cracking) during welding and brazing is low, because any oxygen is not contained. Oxygen free copper is recommended for the parts with welding and brazing.
The content of copper is around 99.90%, it contains 200-500 ppm oxygen. The electrical conductivity, the thermal conductivity are same as Oxygen free copper.
OFC (MOFC-10200) and TC are mainly used for electrical components, automotive parts, electrodes, terminals, and connectors.
The chemical component of OFC (MOFC-10200) is as follows.
| Cu |
|---|
| 99.96Min |
The chemical component of tough-pitch copper (TC) is as follows.
| Cu |
|---|
| 99.90Min |
It shows the physical properties of OFC (MOFC-10200) and tough-pitch copper (TC).
Note: The following are representative values.
| Property | Representative Value |
|---|---|
| Specific Gravity (293K) | 8.94 |
| Coefficient of Thermal Expansion (×10-6/K：293～573K) |
17.7 |
| Thermal Conductivity (W/(m・K)：293K) |
391 |
| Volume Resistivity (μΩm：293K) |
0.0171 |
| Electrical Conductivity (%IACS:293K) |
101 |
| Modulus of Elasticity (kN/mm２:293K) |
118 |
The mechanical properties of MOFC-10200 and TC are as follows.
MOFC-10200 and TC have common mechanical properties
Note: The data are average values of the results of the testing performed on test samples taken in a longitudinal direction.
| Size | |||||
|---|---|---|---|---|---|
| ø80 | ø60 | ø35 | ø20 | ø10 | |
| H02 | 230 | 250 | 260 | 280 | 285 |
| H04 | 240 | 260 | 280 | 315 | 360 |
