Hastelloy C4 Welding Electrode — AWS A5.11 ENiCrMo-7 Coated Electrode Supplier

Nicorex Alloys is a trusted supplier of Hastelloy C4 coated electrodes in Mumbai, India. It is the most microstructurally stable nickel-chromium-molybdenum welding electrode in the C-family. With 14-17% Mo and 14-18% Cr in near-equal balance, the weld deposit handles both oxidising and reducing acids, chloride pitting, and stress corrosion cracking.

We stock all four standard diameters (2.4 mm, 3.2 mm, 4.0 mm, and 4.7 mm) and supply them with mill test certificates and competitive pricing. Our ISO 9001 certification underpins consistent product quality and reliable service. Classified as ENiCrMo-7 under AWS A5.11 / ASME SFA 5.11 (UNS W86455), this flux-coated SMAW consumable resists grain-boundary precipitate formation in the weld heat-affected zone, the failure mode that limits C-276 and C-22 in as-welded service. Service temperature up to 1900°F (1038°C). Varestraint hot-cracking tests rank C-4 as having the lowest hot-cracking tendency of all C-family alloys (Cieslak et al., Metallurgical Transactions A, 1986). C-4 avoids embrittling constituents entirely. That means no mandatory post-weld heat treatment, no sensitisation concern, and no heat-input restrictions during SMAW. The flux coating provides smooth arc initiation, stable arc characteristics, easy slag removal, and reliable all-position performance, including vertical-up and overhead.

For chemical plants running continuous HCl/H₂SO₄ service, this translates to faster turnaround, lower welding procedure qualification costs, and reduced downtime during maintenance campaigns. No PWHT cycle, no special interpass controls, no sensitisation testing required. DCEP polarity, all standard diameters in stock, ASME IX F-43 qualified. Contact Nicorex Alloys for a quotation.