ECoCr-A electrode Rod

• Standard Compliance‌: Strictly follows AWS A5.13 ECoCr-A international standard, equivalent to domestic D802 and imported Stellite 6 grade
• ‌Core Structure‌: Titanium calcium type coating with pure cobalt-chromium-tungsten alloy core wire, no recycled scrap metal added in raw materials
• ‌Power Requirement‌: DC reverse connection is recommended, it can also run stably on high-power industrial AC welding machines with parameter adjustment
• ‌Available Specifications‌:
  • Diameter options: 2.5mm / 3.2mm / 4.0mm
  • Length range: 300mm - 500mm, non-standard length customization is supported for orders over 5 tons
• ‌Production Traceability‌: Each batch has an independent production number, you can check the full production process record and test report through the number

 Compared to standard welding electrodes on the market, our ECoCr-A product (refined through twelve generations) exhibits superior stability under extreme conditions:

1. Superior high-temperature performance: The weld overlay maintains stable hardness and wear resistance even after long-term service at 650°C; it can operate continuously for over 1,000 hours at 800°C without significant performance degradation.
2. Excellent Overall Corrosion Resistance: It withstands erosion from weak acids, weak alkalis, high-temperature flue gases, and molten metals, while remaining free from intergranular corrosion during long-term use.
3. Excellent impact resistance: The unique alloy formulation reduces the brittleness of the cobalt-based weld overlay, enabling it to withstand more than 10,000 thermal shock cycles without cracking or peeling.
4. Low Dilution Rate: Base metal dilution is controlled below 10% during welding, achieving standard hardness without the need for multi-layer buildup, thereby saving users 30% on welding material costs.
5. Easy to process: The weld overlay has a uniform and non-porous microstructure, which supports direct turning, milling and grinding without the need for porosity repair or secondary repair.

     This electrode is widely used in high-value core components in heavy industry, and is the preferred consumable for many large domestic and foreign metallurgy, petrochemical and power enterprises:

• ‌Valve industry‌: Surfacing and repair of sealing surfaces of high-temperature and high-pressure boiler valves, petrochemical pipeline valves, nuclear power plant isolation valves
• ‌Hot working tool field‌: Welding of hot shearing blades in steel mills, hot forging dies, hot extrusion punches, continuous casting machine rollers
• ‌Energy equipment‌: Overlay welding of burner nozzles in thermal power plants, turbine blades, fluid conveying impellers
• ‌Special repair scenarios‌: Repair of wear parts of mining equipment under high-temperature working conditions, surfacing of glass industry high-temperature forming molds

• Hardness of deposited metal: Stably controlled at HRC 40-45, no large hardness fluctuation in different areas of the same weld
• Tensile strength: ≥ 660MPa
• Impact toughness: ≥ 25J/cm² at room temperature

We provide full-process technical support to help you avoid common welding defects:

1. ‌Electrode pre-treatment‌: Bake the electrode at 150-200°C for 1 hour before welding, and store it in a 100°C heat preservation barrel after taking it out, to prevent the coating from absorbing moisture and causing pores
2. ‌Workpiece preheating‌: Preheat the carbon steel base material to 300-400°C, and preheat the high-alloy steel base material to 500-650°C, to avoid welding cracks caused by excessive temperature difference
3. ‌Welding operation‌: Use short arc and narrow swing welding, the swing width should not exceed 3 times the diameter of the electrode, and do not pause during the welding process to avoid inclusions
4. ‌Post-weld treatment‌: Immediately send the welded workpiece to a 600-700°C tempering furnace for 1-hour heat preservation after welding, then bury it in heat preservation sand and cool it slowly to room temperature, which can effectively eliminate welding stress 

Hot Tags: welding electrode,surfacing electrode,surfacing welding ecocr-aelectrode rod wire,China, manufacturers, suppliers, factory, company, wholesale, discount, low price, high quality, products