Stellite / Cobalt Welding Electrodes
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Stellite welding electrodes are cobalt-based coated electrodes used to deposit hard, wear-resistant layers on metal parts. These cobalt welding rods contain chromium, tungsten, and carbon. This composition gives the weld deposit its ability to resist abrasion, heat, and corrosion at the same time.
A stellite electrode gives high hardness in the as-welded state. The deposit holds its strength above 600°C. Cobalt welding electrodes also resist metal-to-metal wear, hot gas erosion, and chemical attack. Most deposits do not need post-weld heat treatment.
Engineers pick cobalt welding rods when a part must survive abrasive contact, high heat, or chemical attack. A single pass with a stellite welding rod can restore a worn valve or shaft to its full profile. This saves the cost of full part replacement.
Oil and gas plants use stellite hardfacing on valve seats and gate valves. Power plants apply cobalt electrodes on steam valve trim and turbine edges. Steel mills coat hot shear blades and rolling mill guides. Mining and cement plants use stellite welding rods on crusher parts and auger flights.
Nicorex Alloys is one of the leading stellite welding rod suppliers in Mumbai, India. We stock ECOCR-A, ECOCR-B, ECOCR-C, and ECOCR-E grades for quick dispatch.
Complete Range of Stellite / Cobalt Alloy Welding Electrodes
Quick Selection Guide
| Base Metal Being Welded | Recommended Wire / Electrode | AWS Class | Why This Choice |
|---|---|---|---|
| INCONEL 600 or Alloy 800 | INCONEL 82 Welding Wire | ERNiCr-3 | High chromium content prevents hot cracking in nickel-iron base metals |
| HAYNES 230 Components | HAYNES 230-W Welding Wire | ERNiCrWMo-1 | Matched tungsten-bearing chemistry for long-term creep resistance |
| INCONEL 617 Piping | INCONEL 617 Welding Wire | ERNiCrCoMo-1 | Cobalt and molybdenum match for service above 900°C |
| INCONEL 718 Forgings | INCONEL 718 Welding Wire | ERNiFeCr-2 | Niobium content allows age hardening to match base metal strength |
| Cobalt-Based Turbine Vanes (L-605) | HAYNES 25 Welding Wire | – | Cobalt-to-cobalt bond maintains oxidation resistance above 800°C |
| HASTELLOY X Combustion Liners | HASTELLOY X Welding Wire | – | Matched solid-solution chemistry for oxidation resistance to 1200°C |
| Inconel 625 | INCONEL® 112 | ENiCrMo-3 | Matching NiCrMo chemistry preserves corrosion resistance in the joint |
| Inconel 600 / 601 | INCONEL® 182 | ENiCrFe-3 | Matched thermal expansion prevents cracking above 600°C |
| Haynes 230 | Alloy 230-W | ENiCrWMo-1 | Matching tungsten deposit retains oxidation resistance and structural stability approaching 1000°C |
| HASTELLOY C-276 base metal or Inconel 625 | HASTELLOY C-276 Welding Electrode | ENiCr | – |
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High temperature alloys welding wire is filler metal designed to join superalloys that operate above 500°C. These wires deposit weld metal that keeps its strength, resists oxidation, and stays stable under prolonged heat exposure. Engineers use high temperature alloy filler wire when the welded joint must perform as well as the base metal in extreme thermal conditions.
Key features of these filler wires include high creep strength at elevated temperatures, strong resistance to oxidation and hot corrosion, thermal fatigue resistance through repeated heating cycles, and sound metallurgical bonding with nickel-based and cobalt-based superalloys.