Kinds of EK Metals TOP PAGE
The values in this table are our standard values and not specific values.
Alloy Mecanical properties Electrical
conductivity
Temperature
limit on heat
Equivalent
standard
Tensile strength Elongation Hardness
N/m2 % HRB L.A.C.S.%@at20
EK-2 Drown bar 450]550 15-30 78-87 78-88 480-520 JIS Z 3234-2
ISO5182-1978-2-1
RWMA Class 2
Forged Products 390-490 15-30 72-82
Characteristics
& Applications

It is a chromium copper alloy excellent in electrical conductivity and heat resistance and widely used as an electrode material for resistance welding.

EK-3 Drown bar 510]640 15-30 85-92 50-70 490-530 RWMA Class B10
Forged Products 470-590 15-30 78-90
Characteristics
& Applications

Chromium copper and titanium alloy are superior in mechanical strength, Suitable for electrode materials requiring high strength and durability such as high pressure welding.

EK-4 Forged Products 690]880 10-20 95-102 15-30 490-530 RWMA Class B12
Characteristics
& Applications

It is alloyed with chromium copper with high concentration of titanium, it has excellent mechanical strength and abrasion resistance, high tensile strength and high durability, it is also used as a substitute for beryllium copper 25 alloy.

CZ-5 Drown bar 490]600 15-25 80-90 70-85 500-550 JIS Z 3234-2
ISO5182-1978A-2-2
RWMA Class 2
Forged Products 440-540 15-25 75-88
Characteristics
& Applications
Having a high copper-chromium-zirconium content, it's high-temperature strength is best suited for seam welding electorode in particular, the surface treated steel plates resistant welding is being used.
SCZ-7 Drown bar 500]650 10-20 82-92 70-80 500-550 JIS Z 3234-2
ISO5182-1978A-2-2
RWMA Class 2
Characteristics
& Applications

High alloy strength with high concentration of zirconium mixed with chromium copper Excellent high temperature strength and abrasion resistance. It is suitable for contact tips of arm welding with higher grade than CZ-5.

EKB-50 Drown bar 730]880 9-25 93-105 45-60 480-520 JIS Z 3234-3
ISO5182-1978A-3-1
RWMA Class 3
Forged Products 690-830 9-25 93-105
Characteristics
& Applications

Beryllium copper alloy has high strength in high temperature range, excellent thermal conductivity and durability, excellent in stretchability and cutting processability. It is optimum as an electrode material to be used under harsh conditions.

EKB-55 Forged Products 720-840 5-20 95-105 48-60 480-520 JIS Z 3234-3
ISO5182-1978-3-1
RWMA Class 3
Characteristics
& Applications

Having special elements added to the beryllium-copper alloy with a fitting heat treatment,it contains high strengh, themal conductivity and durability that excel in the high temperature range. It is higher in quality than EKB-50.

EKB-25 Drown bar 1100-1500 2-8 HRC
36-45
20-30 315-350 JIS H 3270
C1720
JIS Z 3234-4
Forged Products 970 (Min) 2(Min) HRC 33 (Min)
Characteristics
& Applications
EKB-25 becomes to compare with special steels in high strength by means of the suitable heat treament and it has, besides, the outstanding properties relating to those of specific spring character, electric conductivity resistance and wear resistance.
EK-NS50 Forged Products 600-800 15-25 90-105 40-50 500-550
Characteristics
& Applications
With it's copper-nickel-silicon-chromium alloy, and eco-friendly (beryllium non-containing) attributes, it is best used as electrode material for extreme conditions.