AWS A5.11 NA190 Monel Electrode ENiCu-7 3mm 4mm SMAW Welding Rod Marine Engineering

Product Information
The Electrode ENiCu-7 is a high-performance welding rod designed for the Shielded Metal Arc Welding (SMAW) process. Made primarily of nickel and copper, this electrode is used for welding nickel-copper alloys and bronze in various industrial applications, including marine, chemical, and offshore industries. It provides strong, durable, and corrosion-resistant welds suitable for high-stress and high-impact conditions.

Also known as:

• Nickel-Copper Electrode

• AWS A5.11 ENiCu-7

• UNS W87640 Electrode

  

Material Composition

• Nickel (Ni) ≥ 60%

• Copper (Cu) ≥ 30%

• Manganese (Mn) ≤ 2%

• Silicon (Si) ≤ 0.50%

• Iron (Fe) ≤ 5%

• Cobalt (Co) ≤ 0.5%

• Carbon (C) ≤ 0.10%

• Phosphorus (P) ≤ 0.02%

• Sulfur (S) ≤ 0.03%

  
  

Appearance / Color
The ENiCu-7 welding electrode features a gray to tan flux coating. The core of the electrode is made from a smooth, solid nickel-copper alloy wire that is highly resistant to corrosion, which is essential for welding applications in marine and chemical environments.

Core Wire Diameter

• 3 mm, 4 mm (custom sizes can be requested).

Flux Coating
The flux coating is carefully formulated to ensure low-hydrogen output, offering a stable arc and minimizing the risk of cracking. It also prevents the formation of slag inclusions in the weld, ensuring a high-quality result.

Packaging

• Typically packed in 5.0 kg sealed boxes for convenience and ease of handling.

Characteristics

• Corrosion Resistance: ENiCu-7 electrodes provide excellent resistance to corrosion, particularly in marine and chemical environments. The high nickel and copper content helps prevent rust and degradation caused by exposure to salty and acidic conditions.

• Strong Welds: The electrode is known for producing strong, durable, and high-quality welds, offering excellent tensile strength and elongation.

• Easy to Weld: This electrode is easy to use and provides a smooth, stable arc with minimal spatter, even in challenging welding positions.

• High Impact Resistance: The welds made with ENiCu-7 electrodes are resistant to impact and mechanical stress, making them suitable for structural applications.

Technology
The ENiCu-7 electrode is manufactured using advanced production methods to ensure a high level of purity and consistency. The core wire undergoes rigorous quality control to ensure uniform composition, while the flux coating is precisely formulated for low hydrogen content and optimal arc stability. These technological advancements ensure that the ENiCu-7 electrode performs exceptionally well in industrial applications, providing superior welds under various conditions.

Theory
ENiCu-7 electrodes operate by transferring a stable arc to the workpiece while providing excellent protection against contamination. The flux coating ensures that the weld pool remains clean and free from oxidation during the welding process. The composition of the alloy is carefully balanced to ensure compatibility with nickel-copper alloys, bronze, and other materials that require high resistance to corrosion and mechanical stress.

The nickel content in the electrode provides excellent resistance to oxidation and high temperatures, while the copper enhances the electrode's strength and impact resistance. The combination of these elements results in a weld that is both highly durable and resistant to corrosive environments, making the ENiCu-7 electrode an ideal choice for applications in marine and chemical industries.

Application/Usage

1. Marine and Offshore Applications
   The primary application for ENiCu-7 electrodes is in marine environments, where their corrosion resistance is essential. They are commonly used to weld components that will be exposed to seawater, such as hulls, decks, and marine pipes.

2. Chemical Processing Plants
   The ENiCu-7 electrode is also widely used in chemical processing plants, where its corrosion resistance to aggressive chemicals and acidic environments is crucial. The electrode is often used to weld tanks, pipes, and other components in these settings.

3. Bronze and Nickel-Copper Alloys
   This electrode is specifically designed to weld bronze and nickel-copper alloys. It is ideal for joining or repairing parts made of these materials, which are often used in high-stress applications.

Specification Table

Item	Specification	Standard	Surface Condition
Material	ENiCu-7	AWS A5.11 / ASME SFA A5.11	Bright, Smooth
Diameter	3.0 mm, 4.0 mm		Smooth, Clean
Tensile Strength	≥550 MPa		Polished / Turned
Yield Strength	≥350 MPa		Smooth Finish
Elongation	≥20%		Custom Finish Available
Temperature Resistance	Up to 650°C (1202°F)
Packaging	5.0 kg sealed boxes

Advantages

• Corrosion Resistance: Ideal for applications in marine and chemical environments, the ENiCu-7 electrode provides superior protection against rust, oxidation, and corrosion.

• High Strength Welds: The welds produced with this electrode exhibit high tensile and yield strength, making it suitable for structural applications.

• Versatility: Suitable for SMAW, TIG, and MIG welding processes, giving you flexibility in the choice of welding technique.

• Easy to Use: Known for its low-hydrogen flux coating, ENiCu-7 ensures a stable arc, minimal spatter, and a clean weld surface.

• Available in Various Sizes: Offered in multiple diameters (3.0 mm, 4.0 mm) to accommodate different welding needs.

Service

• Customization: We offer custom diameters and packaging to meet your specific welding requirements.

• Technical Support: Our welding experts are available to assist with electrode selection, welding parameters, and troubleshooting.

• Fast Delivery: We ensure quick and reliable delivery to ensure you meet your project deadlines.

• Quality Assurance: Our products undergo strict quality control to ensure consistency, purity, and excellent performance.

• After-Sales Service: Continuous support and assistance are available even after purchase to ensure your satisfaction.

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