Oxygen-free copper rod is an excellent conductive material for many kinds of electrical apparatus. Libo’s oxygen-free copper rod starts with high-quality copper cathode as its ingot. Using continuous conforming technology, our product achieves a high copper content (≥99.97%) and a very low oxygen content, with high uniformity, low resistivity, a bright surface, and flexible length.
1.Model
WTM(soft), WTY(hard)
Executive standard: GB/T4423-2007
2.Specification
2.1 Size Options
The diameter of copper rod: Φ8～Φ120
2.2 Chemical Composition and Oxygen Content
Table1
Chemical composition and oxygen content of copper rod
(Chemical Composition %, the content of microelement is less than or equal to)
|
Cu+Ag
|
P
|
Bi
|
Sb
|
As
|
Fe
|
Ni
|
Pb
|
Sn
|
S
|
Zn
|
O
|
|
≥99.97
|
0.001
|
0.001
|
0.002
|
0.002
|
0.005
|
0.002
|
0.003
|
0.002
|
0.002
|
0.002
|
0.001
|
Table 2 Size and Tolerance of Copper Rod unit:mm
|
Diameter of Copper Rod
Φ
|
Tolerance
|
|
|
High Precision Level
|
Common Level
|
|
|
8<Φ≤10
|
±0.03
|
±0.05
|
|
10<Φ≤18
|
±0.03
|
±0.06
|
|
18<Φ≤30
|
±0.04
|
±0.07
|
|
30<Φ≤50
|
±0.08
|
±0.10
|
|
50<Φ≤120
|
±0.10
|
±0.12
|
2.4 Straightness
Table 3
The straightness of copper rod in hardness unit:mm
|
Length
|
|
|
Size
|
|||
|
6<Φ≤20
|
20<Φ≤80
|
|||
|
Overall Length
|
Per Meter
|
Overall Length
|
Per Meter
|
|
|
L<1000
|
≤2
|
—
|
≤1.5
|
—
|
|
1000≤L<2000
|
≤3
|
—
|
≤2
|
—
|
|
2000≤L<3000
|
≤6
|
≤3
|
≤4
|
≤3
|
|
L≥3000
|
≤12
|
≤3
|
≤8
|
≤3
|
2.5 Mechanical Property
Table 4
Mechanical Property of Copper Rod
|
Model
|
Status
|
Diameter/mm
|
Tensile Strength/MPa
|
Elongation/%
|
Brinnell's Hardness/HBW
|
|
≥
|
|||||
|
T2
|
Y
|
8~40
|
275
|
10
|
—
|
|
40~60
|
245
|
12
|
—
|
||
|
60~80
|
210
|
16
|
—
|
||
|
M
|
8~120
|
200
|
40
|
—
|
|
Table 5
Resistivity of Copper Rod (
|
Model
|
DC Resistivity(Ω·mm2/m)
|
Conductivity(%IACS)
|
|
WTMR
|
≤0.017241
|
≥100
|
|
WTMY
|
≤0.01777
|
≥97
|
2.7 Surface Quality
The surface of copper rod is smooth and clean, without any defect like crack, peeling, bubble, impurity and circular mark that can be felt by touching.