Premium ERNiCrMo-3 Nickel Alloy Welding Wire – Ultimate Corrosion Resistance for Harsh Environments

Overview

ERNiCrMo-3 welding wire is a high-performance nickel-chromium-molybdenum alloy filler metal specifically designed for welding corrosion-resistant materials such as Inconel® 625, Incoloy® 825, and other similar Ni-Cr-Mo-based alloys. Known for its exceptional resistance to both oxidizing and reducing chemical environments, ERNiCrMo-3 ensures reliable weld integrity even in the most aggressive conditions including seawater, sour gas, and chemical processing systems.

Unlike conventional stainless steel filler metals, ERNiCrMo-3 provides superior protection against localized attack such as pitting, crevice corrosion, and stress corrosion cracking in chloride-rich environments. Its excellent high-temperature strength and oxidation resistance make it suitable for service conditions up to 1000°C (1830°F).

Key Features and Advantages

• Outstanding Corrosion Resistance
  With its optimized Ni-Cr-Mo-Nb chemistry, ERNiCrMo-3 protects weld joints from severe chemical corrosion and chloride-induced cracking.

• High Mechanical Strength
  Welds retain excellent tensile and yield strength even at elevated temperatures, ensuring structural reliability.

• Superior Weldability
  Smooth arc characteristics, minimal spatter, and low fume generation provide ease of welding for both TIG and MIG processes.

• Versatility Across Applications
  Ideal for joining dissimilar metals, repairing high-value components, and fabricating critical process equipment.

• Compliance with International Standards
  Meets AWS A5.14 ERNiCrMo-3, ISO 18274 S Ni 6625, and equivalent specifications.

Chemical Composition (Typical, wt.%)

Welding Techniques and Guidelines

ERNiCrMo-3 is suitable for both GTAW (TIG) and GMAW (MIG) processes:

• TIG Welding
  Recommended for high-quality welds in critical applications, especially where precise heat input control is required.

• MIG Welding
  Offers higher deposition rates for large-scale fabrication projects.

Preheat and Interpass Temperatures:
Generally not required for Ni-base alloys unless base metal dictates.

Post-Weld Heat Treatment:
Not necessary for corrosion resistance, but may be performed for stress relief in specific cases.

Applications in Various Industries

1. Chemical and Petrochemical Processing
   Used extensively in piping, heat exchangers, and pressure vessels that handle aggressive chemicals, including sulfuric, phosphoric, and hydrochloric acids.

2. Marine and Offshore Engineering
   Ideal for seawater systems, desalination plants, and offshore platforms due to its excellent resistance to chloride-induced pitting.

3. Power Generation
   Applied in boiler tubes, superheaters, and turbine components operating at elevated temperatures.

4. Oil and Gas
   Essential for sour gas environments where hydrogen sulfide exposure demands superior stress corrosion resistance.

5. Nuclear Industry
   Suitable for reactor components requiring high integrity and corrosion resistance under radiation and high temperature.

Standards and Approvals

• AWS A5.14 ERNiCrMo-3

• ISO 18274 S Ni 6625

• ASME Boiler and Pressure Vessel Code Section IX Qualified

• NACE MR0175 Compliance for sour gas service

Packaging and Supply Options

• TIG Cut Length Rods:
  1.0 mm, 1.2 mm, 1.6 mm, 2.4 mm, 3.2 mm × 1000 mm

• MIG Spools:
  0.8 mm, 1.0 mm, 1.2 mm, 1.6 mm on 5 kg, 15 kg spools

• Packaging: Vacuum-sealed for moisture protection, export-grade cartons

Storage and Handling

Store in a clean, dry environment to prevent contamination. Avoid exposure to moisture before use. Open packages should be resealed to maintain weld quality.

Technical Parameter Table

FAQ Section (Extended)

1. What materials can ERNiCrMo-3 weld?

• It welds Inconel 625, Incoloy 825, and other Ni-Cr-Mo alloys.

2. Can it be used for dissimilar joints?

• Yes, it’s excellent for joining nickel alloys to stainless steels or low alloy steels.

3. What shielding gas should be used?

• Argon or Ar-He mixtures for TIG, Ar with possible He/CO₂ mix for MIG.

4. What is the maximum operating temperature?

• Up to 1000°C for oxidation resistance.

5. Does it resist seawater corrosion?

• Yes, it provides outstanding protection in chloride-rich environments.

6. Is preheat required?

• Generally no, unless dictated by base material.

7. What wire diameters are available?

• From 0.8 mm up to 4.0 mm.

8. What is the difference between ERNiCrMo-3 and ERNiCrMo-4?

• ERNiCrMo-4 has higher Mo content for increased pitting resistance.

9. Do you provide certifications?

• Yes, MTC (EN 10204 3.1) and third-party inspection reports are available.

10. What is the minimum order quantity?

• Typically 5 kg per size, but custom orders can be discussed.