Diameter (mm)	Length (mm)	Flat Position Current (A)	Vertical / Overhead (A)
2.4 – 2.6	300	50 – 85	50 – 75
3.2	350	70 – 120	65 – 110
4.0	350	90 - 170	85 – 140
4.8 – 5.0	350	110 – 180	—

For vertical or overhead welding, reduce current by 10–15 A from flat position values.

Category	Typical Uses
Monel alloy welding	Monel 400, R‑405, K‑500 – valves, pumps, propellers, shafts, heat exchangers
Dissimilar metal joints	Monel to carbon/low‑alloy steel, Monel to stainless steel, Monel to copper/copper‑nickel
Surfacing & clad welding	Nickel‑copper overlay on carbon steel, repair of Monel‑clad plates
Marine engineering	Seawater piping systems, pumps, valves, propeller shafts, desalination plants, offshore structures
Chemical & petrochemical	Reactors, vessels, piping, electroplating equipment, PVC production, acid handling
Power generation	Flue gas desulfurization (FGD) systems, seawater cooling systems, heat exchangers

Excellent resistance to seawater, salt solutions, sulfuric acid, phosphoric acid, organic acids, reducing media, alkaline solutions, and high‑temperature steam.

Parameter	Requirement
Cleaning	Remove oil, rust, moisture
Preheat	100–150°C (thick or restrained joints only)
Interpass Temp	≤100°C
Polarity	DC+ (reverse polarity)
Technique	Short arc, low current, narrow beads, fast speed
Drying	250–350°C × 30–60 min

For vertical/overhead welding, reduce current by 10–15 A.

Store electrodes in a dry, well‑ventilated warehouse. Keep in original packaging until use.

Redry as specified above if moisture absorption occurs.

Standard packaging:

• Small box: 5 kg (11 lb) – plastic container or vacuum sealed
• Master carton: 20 kg (44 lb) – 4 boxes × 5 kg
• Hermetically sealed steel cans available on request.

1. What is ENiCu-7 welding electrode used for?

ENiCu-7 is used for welding nickel-copper alloys, dissimilar metals, and applications requiring strong corrosion resistance in marine and chemical environments.

2. Can ENiCu-7 be used for repair welding?

Yes. It is widely used for repair and maintenance welding due to its good crack resistance and adaptability.

3. What polarity should be used?

DC positive is recommended for stable arc and optimal weld quality.

4. What is the difference between ENiCu-7 and ERNiCu-7?

ENiCu-7 is a covered electrode, while ERNiCu-7 is a solid wire used for MIG/TIG welding. Both have similar chemical composition but are used in different welding processes.

Contact our technical team for grade confirmation, detailed product datasheets, welding procedure guidance, or to request a project-specific quotation.