| KINDS OF EK METALS |
| Alloy |
Mechanical Properties |
Electrical Conductivity
I.A.C.S.% AT 20% |
Temperature
Limit On
Heat
Resistance
°C |
Equivalent
Standard |
Characteristics &
Application |
Tensile Strength
kgf/mm² |
Elongation |
Hardness
HRB |
| EK-2 |
Drawn bar |
46~56 |
20~30 |
78~85 |
78~85 |
480~520 |
JISZ3234
ISO5182-1978A-2-1
RWMA II |
With durability improved
by adding special element to copper-chromium |
| Forged Products |
40~50 |
20~35 |
72~82 |
| Casting |
35~45 |
15~35 |
70~80 |
| EK-3 |
Drawn bar |
52~65 |
15~30 |
85~92 |
15~30 |
490~530 |
RWMA
B10 |
Having excellent mechanical
strength as well as excellent wear resistance of copper-titanium alloy,
EK-4 is quite suitable for the use of electric conductors where high tensile
strength and durability are required. EK-4 will be used as a substitute
for the high-priced beryllium-copper 25a lloy because it can compare with
the latter quality. |
| Forged Products |
48~60 |
15~30 |
82~90 |
| EK-4 |
Forged Products |
70~90 |
10~20 |
95~102 |
15~30 |
490~530 |
RWMA B12 |
Having high mechanical strength
as well as excellent wear resistance of copper-titanium alloy, EK-4 is
quite suitable for the use of electric conductors where high tensile strength
and durability are required. EK-4 will be used as substitute for the high-priced
beryllium-copper 25 alloy because it can compare with the latter quality. |
| CZ-5 |
Drawn bar |
50~65 |
15~25 |
80~90 |
72~80 |
500~550 |
JISZ3234
ISO5182-1978A-2-2
RWMA II |
Having high temperature
endurance of copper-chromium-zirconium alloy, it is highly recommended
to use CZ-5 for thin electrodes of seam welding machine. Especially CZ-5
show its full ability in the application to resistance welding electrodes
for surface treated steel plates. |
| Forged Products |
45~55 |
15~25 |
78~88 |
| EK-6 |
Drawn Bar |
43~53 |
20~35 |
75~83 |
78~87 |
480~520 |
JISZ3234
ISO5182-1978A-2-1
RWMA II |
Having high durability of copper-chromium
alloy together with well-improved plasticity and machinability. EK-6 is
the very material for the making of bent electrode and holder of welding
machines. |
| TZ-7 |
Forged Products |
55~70 |
12~25 |
87~95 |
45~60 |
490~530 |
JISZ3234
ISO5182-1978A-3-1
RWMA III |
Having excellent electric conductivity
and remarkably improved properties in mechanical strength, wear resistance
and durability of high chromium-zirconium-titanium alloy, TZ-7 is fit
for the electrodes used under severe welding condition TZ-7 gives satisfactory
results in a substitute for the beryllium-copper 50 alloy. |
| EKB-50 |
Drawn Bar |
75~90 |
9~25 |
93~105 |
48~60 |
480~520 |
JISZ3234
ISO5182-1978A-3-1
RWMA III |
Having the most
excellent strength and thermal durability of the beryllium-copper 50 alloy |
| Forged Products |
70~85 |
9~25 |
93~105 |
