Hastelloy Pipe Supplier India

Hastelloy is a family of nickel-molybdenum-chromium superalloys developed by Haynes International. These alloys offer exceptional resistance to uniform corrosion, localized attack (pitting and crevice), and stress corrosion cracking in the most aggressive chemical environments. Hastelloy pipes are used where stainless steel and even duplex grades fail — in concentrated hydrochloric acid, sulfuric acid, wet chlorine gas, and mixed acid environments. The high molybdenum content (up to 28% in B-grades) provides unmatched resistance to reducing acids, while the chromium content in C-grades protects against oxidizing media.

Hastelloy C-276 (UNS N10276) contains 16% Cr, 16% Mo, and 4% W — making it the most versatile corrosion-resistant alloy for both oxidizing and reducing environments. C-22 (UNS N06022) has higher chromium (22%) and slightly lower molybdenum (13%) — giving it superior resistance to oxidizing acids and chlorine-contaminated environments but slightly less performance in pure reducing acids. C-22 also has better weldability with less susceptibility to grain-boundary attack in the heat-affected zone. For general chemical processing where both oxidizing and reducing conditions exist, C-276 is the standard choice. For predominantly oxidizing environments or where welding integrity is critical, C-22 is preferred.

Creative Metal Industries supplies Hastelloy seamless pipes from 1/2 inch (15NB) to 12 inches (300NB) in schedules SCH 10S, 20S, 40S, 80S, 120, and 160 as per ASTM B622 (seamless) and ASTM B619 (welded). We also stock Hastelloy welded pipes up to 24 inches for large-diameter chemical process piping. Tube sizes per ASTM B622 are available from OD 6.35mm to 114.3mm. Fittings (elbows, tees, reducers) per ASTM B366 and flanges per ASTM B564 complete the piping system. Standard lengths are 5-7 metres random, with fixed and cut-to-length options.

Hastelloy C-276 pipe prices in India range from Rs 4,500 to Rs 12,000 per kilogram depending on size, schedule, quantity, and current nickel/molybdenum market rates. C-276 is one of the most expensive engineering alloys due to its high nickel (57%) and molybdenum (16%) content. Welded pipes are 20-30% less expensive than seamless for equivalent sizes. Creative Metal Industries offers competitive pricing through direct relationships with mills like Haynes, VDM Metals, and Special Metals. Volume discounts apply for project quantities above 500 kg.

In India, Hastelloy pipes are primarily used in: Chemical manufacturing — HCl production, chlor-alkali plants, agrochemical reactors. Pharmaceutical — active pharmaceutical ingredient (API) reactors handling corrosive solvents. Petrochemical — sour gas processing, amine units, acid gas removal. Fertilizer — phosphoric acid and sulfuric acid piping. Flue Gas Desulphurization (FGD) — absorber towers and wet scrubber ducting in thermal power plants. Pulp and paper — bleach plant piping handling chlorine dioxide. Nuclear — spent fuel reprocessing where mixed acids are present. Creative Metal Industries has supplied Hastelloy to all these sectors since 2012.

Hastelloy pipes are welded using GTAW (TIG) or SMAW processes with matching filler metals — ERNiCrMo-4 (C-276), ERNiCrMo-10 (C-22), or ERNiMo-7 (B-2). Key precautions: Use low heat input (0.5-1.5 kJ/mm) to minimize segregation of molybdenum and tungsten. Interpass temperature must not exceed 95°C. Clean all surfaces thoroughly — Hastelloy is sensitive to sulfur contamination. No preheating or PWHT required for C-grades. For B-2 grade, avoid oxidizing conditions during welding. Solution annealing the completed weldment (1120°C, water quench) provides maximum corrosion resistance. CMI provides welding guidance and qualified WPS documentation with every Hastelloy pipe supply.