TOKO 2535Nb NiCr Alloy Welding Rods

TOKO E2535Nb is nickel-chromium-based Alloy Welding rods | designed for specialized welding applications requiring exceptional resistance to high temperatures, oxidation, and corrosion. These rods are engineered for joining and repairing nickel-chromium alloys, particularly in demanding environments such as power plants, petrochemical facilities, and high-temperature industrial equipment.

1. Key Features & Composition

• Chemical Composition:
• Nickel (Ni): Primary base metal (~25-35%), providing ductility and corrosion resistance.
• Chromium (Cr): Enhances oxidation and scaling resistance at elevated temperatures (~20-25%).
• Niobium (Nb): Added as a stabilizing element to prevent carbide precipitation and improve creep resistance.
• Minor elements like manganese (Mn), silicon (Si), and molybdenum (Mo) may be included to refine weld properties.

Mechanical Properties:

• Excellent high-temperature strength (up to ~1000°C/1832°F).
• Superior resistance to thermal fatigue, sulfidation, and carburization.
• Good toughness and ductility in both as-welded and heat-treated conditions.

Welding Characteristics:

• Arc Stability: Smooth arc transfer with minimal spatter.
• Slag Detachability: Self-lifting slag for easy removal.
• Positional Welding: Suitable for flat and horizontal positions (typical for SMAW electrodes).

2. Applications

• Repairing or welding nickel-chromium alloy components exposed to extreme heat (e.g.,furnace parts, reformer tubes, heat exchangers).
• Joining dissimilar metals where thermal expansion mismatch is a concern.
• Used in industries such as:
• Power generation (boilers, turbines).
• Petrochemical (reactors, catalytic crackers).
• Aerospace and thermal processing equipment.
  

3. Welding Parameters & Handling

• Preheat/Interpass Temperature: Typically 150–250°C (302–482°F) to avoid cracking.
• Post-Weld Heat Treatment (PWHT): Optional, depending on application requirements (e.g., stress relieving).
• Storage: Keep in dry conditions to prevent moisture absorption (use a rod oven if required).

4. Compliance & Safety

• Meets international standards such as AWS A5.11 (for nickel-alloy electrodes).
• Safety Precautions: Use adequate ventilation to avoid inhalation of fumes containing nickel and chromium compounds.

5. Why Choose TOKO 2535Nb Welding Rods?

TOKO’s expertise in high-performance welding consumables ensures these rods deliver reliable, crack-free welds in critical high-temperature applications. Their balanced composition and controlled arc behavior make them ideal for maintaining structural integrity in aggressive environments.