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Cu Bar
Our bus bars are finished by cold rolling a hot rolled material or finished by either cold rolling or drawing an extruded material. Other than tough pitch Cu, oxygen free Cu, as same for Cu rods, it can be produced with Ag tough pitch Cu, Ag oxygen free Cu.
Types of Cu Bars
| Description | Code | Our Material Code | Application |
|---|---|---|---|
| TPC | C1100BB | TPC Cu: min. 99.90% |
Superior electrical and thermal conductivity with good ductility and corrosion resistance. For wire rod, switch bar, electrical parts. |
| OFC | C1020BB | OFC-2 Cu: min. 99.96% |
Superior electrical and thermal conductivity with good ductility, stamping properties and corrosion resistance with no hydrogen embrittlement and superior welding brazing properties. For semiconductor heat sink, wire rod, switch bar, electrical parts. |
| OFC for Electron Tube | C1011BB | OFC-1 Cu: min. 99.99% |
All properties stated above plus less separation of oxide layer. For electron tube and flanges, magnetron vain. |
| Ag-TPC | ー | 3 AgTPC | Ag content 0.027～0.034% for field coil for turbine generators |
| 8 AgTPC | Ag content 0.085～0.102% for field coil for turbine generators | ||
| 20 AgTPC | Ag content 0.15～0.25% for electrical component | ||
| Ag-OFC | ー | 3 AgOFC | Ag content 0.027～0.034% for generator parts |
| 8 AgOFC | Ag content 0.085～0.102% for generator parts |
Production Range of Cu Bars
Standard length of a bar is 5000mm and longer length (max. 10m) can be arranged in some cases.
Thickness over JIS standard(JIS H3100) can also be arranged.
Dimensional Tolerance
| Thickness/Width | Thickness Tolerance | Width Tolerance | length tolerance | camber | ||
|---|---|---|---|---|---|---|
| under200 | over200, under500 | under100 | 0ver100, under500 | |||
| over2, under3.2 | ±0.08 | ±0.09 | ±0.8 | ±1% | +15 -0 |
max.3.5mm/2m |
| over3.2, under5 | ±0.10 | ±0.11 | ±1.0 | |||
| over5, under8 | ±0.12 | ±0.13 | ||||
| over8, under12 | ±0.15 | ±0.18 | ||||
| over12, under20 | ±0.20 | ±0.23 | ||||
| over20, under50 | ±1.2% | ±1.3% | ||||
- Camber is a depth in the width wise direction of an arc in unit length of 2m.
- For more severe tolerances are required, or required size is out of range from the above list, may be able to accept in some cases.
Specified Chamfer Radius
The standard chamfer for Cu bar is less than approx.0.8mm and also the
types listed can be applied. Round edge and full round edge can be
applied in some cases.
| Thickness（㎜） | Width（㎜） | Chamfer radius（㎜） |
|---|---|---|
| 2min 5max | 10min125max | About 0.8 |
| 5over8max | 10min300max | About 1.2 |
| 8over50max | 15min100max | About 1.6 |
Mechanical Properties of Cu Bars
| Classification | temper | Tensile Strength | Bend Test | ||||
|---|---|---|---|---|---|---|---|
| Thickness （㎜） |
Tensile Strength （N/㎟） |
Elongation （%） |
Thickness （㎜） |
Bending Angle | Inner bending radius | ||
| TPC Bar（C1100BB） OFC Bar（C1020BB） OFC Bar for Electron Tube（C1011BB） |
O | 2min 30max |
195min | 35min | 2min 15max |
180° | 0.5 times the thickness |
| 1/4H | 2min 30max |
215〜275 | 25min | 2min 15max |
180° | 1 times the thickness | |
| 1/2H | 2min 20max |
245〜315 | 15min | 2min 15max |
90° | 1.5 times the thickness | |
| H | 2min 10max |
275min | ー | ー | ー | ー | |
Bending test will only be conducted if requested directly by customer.
Electrical Conductivity
| Temper | Thickness（㎜） | Electrical Conductivity ％（20℃） | |
|---|---|---|---|
| TPC,OFC | OFC for Electron Tube | ||
| O | 0.5min | 100min | 101min |
| 1/4H | 2max | 98min | 98min |
| 2over | 99min | ||
| 1/2H | 2max | 98min | 98min |
| 2over | 99min | ||
| H | 2max | 97min | 97min |
| 2over | 98min | ||
