Hitachi Cable,Ltd. was the first to succeed in a mass production of oxygen free copper products in Japan in 1960s. Since then, its applications have been expanded due to its high purity and superior characteristics.

Among copper for industrial use, there are three kinds of copper as shown below. Oxygen free copper exhibits excellent characteristics such as electrical conductivity, weldability, formability and adhesion of oxide film. Moreover it exhibits very low gas emission and no hydrogen embrittlement because of its extremely high purity.

JIS No. Chemical Composition
(wt%)		 Electrical Conductivity
(%IACS)		 Softening Temp
(ºC)		 Hydrogen
Embrittlement		 Typical Application
Oxygen Free
Copper
 C1011
C1020		 Cu:99.995
O2:0.0003		 102 200 None Materials for electrical conductors and high vacuum devices
Tough Pitch
Copper		 C1100 Cu:99.95
O2:0.035		 101 160 Occurrence Conductors for cable and wire
Phosphorus
Deoxidized
Copper		 C1220 Cu:99.95
O2:0.005
P:0.02		 82 320 Occurrence Copper tube
Heat exchanger of water heater.



Hitachi Cable provides strip coils and sheets made of oxygen free copper and copper alloys for many applications.

OFC Cu-Sn
Alloy		 Cu-Ag
Alloy
Description C1020
(OFCN)		 SCUR
(HCL-12S)		 AGCUR
(3AgOFC)		 AGCUR
(8AgOFC)		 AGCUR
(20AgOFC)
CDA No. C10200 C14410 C10400 C10700 -
Tensile
Strength
(N/mm2)		 360 400 360 360 360
Elongation
(%)		 3 3 3 3 3
Hardness
(MHv)		 115 120 120 120 120
Electrical
Conductivity
(%IACS)		 100 90 99 98 98
Coefficient of
Thermal
Expansion
(x10-6/ºC)		 17.7 17.7 17.7 17.7 17.4
Softening
Temperature
(ºC)		 200 350 350 360 360
Application Heat Sink
Conductor		 Descrete
Dual Gauge
for Power-TRS		 TRS Leadframe
Connector		 Commutator Commutator



Material Thickness (mm) Width (mm)
min. max. min. max.
OFCG
OFCN
DCu
TPC		 0.008 3.5 10 600
3AgOFC
8AgOFC
20AgOFC		 0.05 2.5 10 450
HCL-12S 0.05 2.5 10 600


Coil Weight per 1 mm - width (α):6 kg / mm (max) or 10 kg / mm (max)
Coil Length (m) : α x 1,000 / (8.95 x t) t : thickness (mm)
depending on material