We are Riddhi Siddhi Impex, an ISO 9001, ISO 14001, and ISO 45001-certified Mumbai-based Hastelloy Alloy Coils supplier and stockist established in 2002. We stock Hastelloy C276 and C22 coils to ASTM B575 / ASME SB-575 from reputed primary mills. Ready annealed inventory, a monthly supply capacity of 400 to 500 tonnes, and dispatch within 4 to 5 days keep chemical plants and scrubber projects moving without mill lead times.
Hastelloy coils are continuous lengths of flat-rolled nickel-chromium-molybdenum alloy wound after hot or cold rolling. Fabricators reach for them where stainless steel fails to withstand harsh conditions. Wet chlorine, hot contaminated mineral acids, chloride-laden brines, and process streams that swing between oxidising and reducing conditions all defeat conventional grades through pitting and crevice attack; the molybdenum-rich chemistry of the C-family alloys shuts those mechanisms down. The metal also resists chloride stress-corrosion cracking, so thin slit strips formed into bellows, diaphragms, and seals keeps its integrity under sustained load. Coil feed suits continuous stamping and roll forming, and every blank nests along one rolled length, which matters at Hastelloy prices because scrap costs real money.
Our Mumbai and Taloja warehouses hold Hastelloy coil across both rolling routes. Hot-rolled pickled material covers the heavier gauges up to 5 mm, while cold-rolled coils run down to 0.03 mm. Coil ID spans 150 to 610 mm with OD up to 1800 mm, and material dispatches in the annealed, soft condition, the standard mill supply state for these alloys. Every source coil lands with its mill documentation before the slitter touches it, so heat traceability survives from melt to delivered width. Buyers take full source coils or slit widths from the same stock, with technical data sheets available on request.
We hold a ready stock of 2 Hastelloy coil grades, C276 and C22. The corrosive environment decides between them, and most enquiries settle the question in a single conversation.
Hastelloy C276 (UNS N10276) is a versatile nickel-chromium-molybdenum-tungsten alloy, handling both oxidising and reducing conditions. Plants choose it for single-coil reliability during upsets.
View gradeWhen conditions are mainly oxidising, Hastelloy C22 (UNS N06022) outperforms C276 against pitting and crevice attack. Pharma and waste-treatment plants use it in wet oxidising chlorides.
View grade3 industrial sectors specify most of the Hastelloy alloy coils leaving our slitting lines. Whether the medium oxidises or reduces usually settles which grade wins the order.
Acid plants and agrochemical producers form Hastelloy C276 Coils into reactor linings, column internals, and heat exchanger strips for streams carrying hot contaminated sulphuric, phosphoric, and hydrochloric acids. Process upsets that flip a stream from reducing to oxidising leave C276 untouched, which is exactly why plants standardise on it. Slit widths feed straight into the gasket and seal production for the same units.
FGD scrubbers in coal-fired power stations run wet, chloride-rich, and acidic all at once, one of the harshest environments in industry. Fabricators wrap absorber towers and line ductwork with thin C276 coil, while Hastelloy C22 Coils take the outlet duct zones where oxidising chloride condensates concentrate and pitting risk peaks.
Clean-in-place chemistry, chloride-bearing buffer solutions, and repeated steam sterilisation wear down process equipment over the years of campaigns. Pharmaceutical builders form Hastelloy C22 Coils into vessel components and transfer-line parts because the grade shrugs off oxidising sanitising agents, and a BA finish delivers the smooth, cleanable surface the industry validates.
Documentation follows every coil out of the warehouse. Riddhi Siddhi Impex operates under three ISO certifications, with mill-level traceability beneath them.
An EN 10204 Type 3.1 mill test certificate accompanies each dispatch, traceable to the originating mill heat. Type 3.2 certification comes on request.
ISO 9001:2015 certifies the quality management system governing how we source, stock, and slit material.
Our environmental practices run under ISO 14001:2015, from coil storage through handling and dispatch.
ISO 45001:2018 sets the occupational health and safety framework across the warehouse and the slitting floor.
Hastelloy is a nickel alloy, so flat-rolled coils clear under HS heading 7506, which covers nickel plates, sheets, strip, and foil; alloyed material falls under subheading 7506.20. Confirm the final classification with your customs broker before shipment.
Yes, Hastelloy Coils sit in our Mumbai stock year-round. Standard dispatch takes 4 to 5 days, and urgent orders leave within 2 to 3 days.
Yes. Our lines cut anywhere between 3 mm and 2000 mm wide and hold ±0.1 mm on the finished width. Inner diameters run 150 to 610 mm, outer diameters reach 1800 mm, and edges ship slit, deburred, or rounded to order.
Riddhi Siddhi Impex has held Hastelloy coil stock in Mumbai since 2002, serving buyers across India along with export markets worldwide. Call or WhatsApp us and a quote will reach you within 24 hours.
