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TOKO 2535Nb NiCr Alloy Welding Rods
Premium nickel-chromium-based 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.
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).
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.
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).
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.
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.
Technical Documentation
📥 Download Welding Rods MTC (PDF)
📥 Download Welding Wire MTC (PDF)