Hastelloy is a nickel-based corrosion-resistant superalloy, with major grades including C‑276 (UNS N10276), C‑22 (N06022), B‑3 (N10675), and others.

Hastelloy Alloy

Hastelloy is a nickel-based corrosion-resistant superalloy, with major grades including C‑276 (UNS N10276), C‑22 (N06022), B‑3 (N10675), and others. The Hastelloy round wire and flat wire supplied by our company are primarily used as welding filler materials and corrosion‑resistant structural components, applied in extremely corrosive environments such as the chemical industry, flue gas desulfurization, and nuclear waste treatment.

Alloy C‑276: Contains Ni 57%, Cr 16%, Mo 16%, Fe 5%, and W 3.5%, with a resistivity of approximately 1.30 μΩ·m. It exhibits excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, and performs particularly well in wet chlorine gas, hypochlorite, and sulfur dioxide. Our C‑276 round wire has diameters of Φ0.8–4.0 mm (mainly used as welding wire), while the flat wire, with thicknesses of 1.0–3.0 mm, is used for manufacturing linings and sieve plates.

Alloy C‑22: With a higher Cr content (22%) and 13% Mo, it outperforms C‑276 in oxidizing acids and is primarily used in more demanding pickling equipment.

Alloy B‑3: A Ni‑Mo alloy (Mo 28%), resistant to pure hydrochloric acid and reducing media such as sulfuric acid.

Production Process: The melting of Hastelloy must be carried out under vacuum or a protective atmosphere to prevent the oxidation of Mo and Cr. Hot working is challenging; our company employs extrusion or hot forging for breakdown, followed by precision cold drawing. Due to the extremely high cost of the alloy, we produce on a made‑to‑order basis, strictly controlling the material yield rate. Each batch is supplied with certified chemical composition, mechanical properties, and corrosion rate (per ASTM G28 Method A – boiling ferric sulfate‑sulfuric acid test) as required by ASTM B574.

Applications: ① Nozzles and agitator shafts in flue gas desulfurization (FGD) systems; ② Internal linings for chemical reactors; ③ Valves in nuclear fuel reprocessing equipment; ④ Paper bleaching towers. Our company can supply ERNiCrMo‑4 (C‑276) welding wire, compatible with all grades for welding. The minimum order quantity is 20 kg, and the delivery lead time is 20–30 days.

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