Manufacturer: Nippon Avionics Co., Ltd.
Model: EH/EP/EO/EL Series
This section introduces electrode (EH/EP/EO/EL Series) materials and resistance weldability for resistance welders.
Selecting the electrode material to match the work material to be welded is one of the most important factors for good joining result.

Materials of Electrode

The list below shows rough standards to choose materials for an electrode, though it may be changed according to its surface treatment or dimensions.

RWMA stands for The Resistance Welding Manufacturing Alliance.
IACS stands for International Annealed Copper Standard.

Shape of Electrode EH/EP/EO/EL Series

Electrode Number	Shape	Applicable Weld Head
EH-062-02A		NA-121 NA-141
EH-125-02A EH-125-03 EH-125-20		NA-121 NA-122 NA-123 NA-141 NA-142 NA-143 NA-60A
EH-125-00C EH-125-11A EH-125-13C
CC Alloy (3.2φ)
EP-711-00F EP-711-02F		NA-131 NA-132 NA-141 NA-142
EP-406-00F EP-406-02FA
Molybdenum Square Bar

Electrode Number	Shape	Applicable Weld Head
EH-250-02A EH-250-03		NA-122 NA-123 NA-124 NA-142 NA-143 NA-60A NA-43
EH-250-00C EH-250-11A EH-250-13C
EO-250-02A EO-250-03
EO-250-00B EO-250-11A EO-250-13A
EH-250-02S
EH-250-00SB EH-250-13S
CC Alloy (6.4φ)

Electrode Number	Shape	Applicable Weld Head
EH-80-00		NA-124
EH-60C
EH-F-00		NA-125
EH-F-02
EH-200-00A		NA-126
EH-200-02A
EH-125-02E EH-125-20E		NA-141 NA-142 NA-143

Electrode Number	Shape	Applicable Weld Head
EL-125-02A EL-125-03		NA-54A
EL-125-00B EL-125-11A EL-125-13A
EL-54LA		NA-54LA
EH-57A-02A		NA-57A

Weldability by Resistance Welding for Each Material

This table is intended to be a guideline only, and it should not be interpreted as guaranteeing the welding result. Please feel free to consult with us as we will be pleased to sample test for you.

• RWMA for the electrode material indicates the specifications by Resistance Welding Manufacturing Association.