We are Riddhi Siddhi Impex, an ISO 9001, ISO 14001, and ISO 45001-certified Mumbai-based Monel sheets and plates supplier and stockist established in 2002. We stock Monel 400 cold-rolled sheets from 3.8 mm and hot-rolled plates in heavier gauges to ASTM B127 / ASME SB-127. A supplying capacity of 400-500 tonnes per month, ready inventory, and dispatch within 4 to 5 days keep marine and chemical plant procurement moving.
Monel sheets and plates are flat-rolled products of a nickel-copper alloy in which nickel dominates and copper makes up most of the balance. Gauge and rolling route separate the two forms. Cold rolled sheet covers thicknesses up to 6 mm, and hot rolled plate takes over above that line. Both elements stay in solid solution, so heat treatment can't strengthen the material; cold work alone does. What buyers pay for is corrosion behaviour. The nickel-copper matrix resists flowing seawater, brine, and hydrofluoric acid, media that pit or crack ordinary stainless steel, and it keeps its toughness from cryogenic temperatures up to about 540°C (1000°F).
As reliable monel sheet suppliers, our Mumbai and Taloja warehouses hold Monel sheet and plate in the annealed condition, within a combined stock of 1000 tonnes annually. Width options span 1000 mm, 1219 mm, 1500 mm, and 2000 mm, with custom slitting held to ±0.1 mm. Every consignment traces back to its mill heat. Technical data sheets travel with the material on request.
We maintain ready stock of a single, premium Monel 400 grade specifically engineered to deliver exceptional corrosion resistance in harsh seawater and aggressive acid environments.
3 sectors utilise the Monel plates and sheets issued from our warehouses. The service medium at each site decides the gauge and finish.
Seawater piping components, pump and valve bodies, and offshore hardware: all three are slit from Monel 400 plate because the alloy withstands flowing seawater without cathodic protection. Shipyards order sheet for splash-zone sheathing and fastener stock duties, where painted steel needs replacing every few seasons.
Hydrofluoric acid alkylation units build columns, trays, and heat exchangers. Stocked Monel 400 sheet handles these duties, since few other materials survive HF contact at all. Plants running caustic and reducing acid streams order plate for vessels and agitators. During shutdowns, our ready stock shortens the wait for replacement panels.
Monel 400 plate is utilised in separators, wellhead trim, and pressure housings that are subjected to sour gas and hot brine. The high nickel content holds up in chloride-bearing service that cracks conventional alloys, so operators reorder the same material at overhaul rather than requalify a substitute.
Documentation accompanies every Monel dispatch. Riddhi Siddhi Impex holds three ISO certifications, with mill-level traceability behind each heat we sell.
Every consignment ships with an EN 10204 Type 3.1 mill test certificate tied to the originating heat. Type 3.2 certification with a third-party witness is arranged on request.
Our quality management system is certified to ISO 9001:2015, covering mill sourcing, inward inspection, storage, and final packing.
ISO 14001:2015 governs our environmental management across both warehouses, from material handling through waste routines.
Occupational health and safety under ISO 45001:2018 protects the team that moves heavy nickel alloy plates every working day.
Monel sheets and plates fall under HS heading 7506, which covers nickel plates, sheets, strip, and foil; Monel is classified as a nickel alloy, so subheading 7506.20 applies. Confirm the final code with your customs broker before shipment.
Yes. Sheets run 3.8 mm to 6 mm in widths of 1000 mm, 1219 mm, 1500 mm, and 2000 mm, slit to ±0.1 mm for custom widths. Plates above 10 mm and non-standard dimensions are arranged against order.
You can buy Monel sheets and plates from Riddhi Siddhi Impex in Mumbai, where we've stocked nickel alloy flat products since 2002 for buyers across India and abroad. Call or WhatsApp our team, and a quote will reach you within 24 hours.
