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.
Key Advantages
- High-Temperature Resistance: Excellent performance up to ~1000°C/1832°F.
- Exceptional Corrosion Resistance: Superior resistance to oxidation, sulfidation, and carburization.
- Stabilized Composition: Niobium (Nb) prevents carbide precipitation and improves creep resistance.
- Good Toughness and Ductility: Maintains mechanical properties in as-welded and heat-treated conditions.
- Arc Stability: Smooth arc transfer with minimal spatter.
Performance Benefits
- Self-Lifting Slag: Easy slag removal for efficient welding.
- Positional Welding: Suitable for flat and horizontal positions.
- Thermal Fatigue Resistance: Maintains integrity under cyclic thermal stresses.
- Dissimilar Metal Welding: Effective for joining materials with different thermal expansion coefficients.
Common Applications
- Power generation (boilers, turbines)
- Petrochemical facilities (reactors, catalytic crackers)
- Furnace parts and heat treatment equipment
- Heat exchangers and reformer tubes
- Aerospace and thermal processing equipment
Technical Specifications
Chemical Composition
| Element | Percentage |
|---|---|
| Nickel (Ni) | 25-35% (Primary base metal) |
| Chromium (Cr) | 20-25% (Enhances oxidation resistance) |
| Niobium (Nb) | Stabilizing element (prevents carbide precipitation) |
| Manganese (Mn), Silicon (Si) | Minor elements to refine weld properties |
Mechanical Properties
| Property | Value |
|---|---|
| High-Temperature Strength | Up to ~1000°C/1832°F |
| Thermal Fatigue Resistance | Superior performance under cyclic thermal stresses |
| Sulfidation & Carburization Resistance | Excellent in aggressive environments |
| Toughness & Ductility | Good in both as-welded and heat-treated conditions |
Welding Parameters
| Parameter | Value |
|---|---|
| Preheat/Interpass Temperature | 150–250°C (302–482°F) |
| Post-Weld Heat Treatment (PWHT) | Optional, depending on application requirements |
| Welding Positions | Flat and horizontal (typical for SMAW electrodes) |
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
- Store in dry conditions to prevent moisture absorption (use a rod oven if required)
Why Choose TOKO 2535Nb Welding Rods?
- Proven Reliability: Trusted in critical high-temperature applications.
- Balanced Composition: Optimized for crack-free welds in aggressive environments.
- Controlled Arc Behavior: Ensures consistent, high-quality welds.
- Global Compliance: Meets international standards for nickel-alloy welding.