Alloy 20 Supplier in Chennai for Sulphuric-Acid Chemical Equipment

Alloy 20 Supplier in Chennai for Sulphuric-Acid Chemical Equipment

Alloy 20 (20Cb-3, UNS N08020) plate, sheet and bar for chemical plants in Chennai that handle sulphuric acid. It was designed for that acid: a nickel-iron-chromium alloy with copper and molybdenum, stabilised with niobium so welds resist intergranular attack. Plants in Manali, Gummidipoondi, Thiruvallur and Kakkalur use it for pickling tanks, acid coolers, pump and valve parts, and mixing equipment. Ganesh Metals supplies Alloy 20 plate, sheet and bar and has been a high-nickel alloy stockist, supplier and processor in Mumbai since 1992.

We provide direct door delivery to your company in Chennai. Alloy 20 is cut and packed at our Mumbai shop and supplied from our Mumbai stock to Manali, Gummidipoondi, Thiruvallur, Kakkalur, Ambattur or Guindy. Send the acid strength and temperature with your sizes, and we will confirm Alloy 20 is the sensible choice before quoting.

Alloy 20 specifications

Alloy 20 (UNS N08020, W.Nr 2.4660): plate, sheet and strip ASTM B463 / ASME SB463, bar ASTM B473, seamless pipe ASTM B729, welded pipe ASTM B464, welded tube ASTM B468.

Equivalents: W.Nr 2.4660, also sold as 20Cb-3. Forgings and flanges ASTM B462; fittings ASTM B366 (WP20CB).

Pipe, tube and flanges: sizes confirmed per enquiry, from Mumbai stock.

Choosing between acid alloys: Alloy 20 for sulphuric acid across a wide range of strengths at moderate temperature; Incoloy 825 when chlorides or sour conditions join the acid; Hastelloy C276 for hot mixed acids, hydrochloric acid or wet chlorine.

Typical chemistry: Ni 32–38%, Cr 19–21%, Cu 3–4%, Mo 2–3%, Nb 8×C to 1.0%, C 0.07% max, iron balance. Density about 8.08 g/cm³.

Minimum properties, ASTM B463 annealed plate: tensile 551 MPa, yield 241 MPa, elongation 30%.

Welding note: Alloy 20 is usually welded with ER320LR filler, and the niobium in the base metal keeps the heat-affected zone resistant to intergranular attack.

Related pages: Alloy 20 grade data · Incoloy 825 · Hastelloy C276 · Incoloy in Chennai · Hastelloy in Chennai · Incoloy 825 plate in Chennai · Hastelloy C276 plate in Chennai

Alloy 20 forms for chemical plants

Tank and vessel work needs plate and sheet cut to shell, bottom and liner sizes; pump and valve shops need round bar cut to length for shafts, impellers and trim. We supply both, cut to your list, with circles punched for blanks and the heat number kept on every piece. Alloy 20 MTCs are often asked for in plant audits, and every supply carries the mill's 3.1 certificate.

How to order Alloy 20 for Chennai

1. Call +91 22 6636 2372, WhatsApp +91 99872 73700 or email sales@ganeshmetals.com with the grade (Alloy 20), form, plate thickness or bar diameter, cut sizes or lengths, quantity, and the acid strength and temperature. You can also use our enquiry form.

2. We confirm stock and send price, availability and the MTC heat number.

3. You confirm the order and the transporter. We cut, mark, pack, dispatch and share the documents.

Where Alloy 20 is used in Chennai chemical plants

Sulphuric-acid handling in Manali: Alloy 20 for acid coolers, dilution equipment, tank linings and transfer-pump parts.

Pickling and metal-finishing lines in Ambattur and Guindy: Alloy 20 plate for pickling tanks, heating coils and hooks in sulphuric-acid baths.

Chemical and dye-intermediate units in Gummidipoondi and Kakkalur: Alloy 20 for reactors, agitators and mixing tanks.

Pharma and fine-chemical plants near Thiruvallur: Alloy 20 bar for valve trim, pump shafts and fittings in acid transfer service.

Fertiliser and phosphate operations in the North Chennai belt: Alloy 20 for scrubber parts and acid-wetted equipment.

Why Chennai chemical plants order Alloy 20 from Ganesh Metals

High-nickel alloy stockist, supplier and processor in Mumbai since 1992.

The mill's original EN 10204 3.1 test certificate is passed on with every supply, with heat-number traceability.

ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018 certified.

Plate and bar are cut to the sizes your job needs, so you are not left holding costly offcuts.

Alloy 20 is grade-checked on every lot, as it is easily confused with 825 once cut.

Honest grade advice: if 825 or C276 suits your acid better, we will say so.

FAQs — Chennai

Do you supply Alloy 20 to Chennai chemical plants?

Yes. We send Alloy 20 plate, sheet and bar to Manali, Gummidipoondi, Thiruvallur, Kakkalur, Ambattur and Guindy, supplied from our Mumbai stock. We provide direct door delivery to your company in Chennai.

How long does delivery to Chennai take?

That depends on the transporter and route. We confirm the dispatch plan with you when the order is placed.

Alloy 20, Incoloy 825 or Hastelloy C276 for our acid line?

For sulphuric acid at moderate temperature, Alloy 20 is the usual choice. Add chlorides or sour gas and Incoloy 825 is often preferred; for hot hydrochloric acid, mixed acids or wet chlorine, Hastelloy C276 is safer. Send your process data and we will help you compare.

Can you supply Alloy 20 round bar for pump shafts?

Yes. Send the diameter, the cut length and the quantity. We cut bar to length and mark the heat number on each piece.

Will Alloy 20 come with a 3.1 certificate?

Yes. Every supply comes with the mill's original EN 10204 3.1 test certificate, and heat numbers are marked on each piece. Call +91 22 6636 2372 or WhatsApp +91 99872 73700 to discuss your use.