We are Riddhi Siddhi Impex, a Mumbai-based supplier and stockist of Monel 400 Coils, established in 2002. We stock nickel-copper Alloy 400 coils to ASTM B127 / ASME SB-127 in 0.03 mm to 5 mm gauges. Our ISO 9001, 14001, and 45001-certified facility holds a monthly supply capacity of 400 to 500 tonnes, and issues EN 10204 Type 3.1 mill test certificates as standard, with Type 3.2 on request.
Monel 400 coils are continuous flat-rolled lengths of nickel-copper alloy wound for slitting and onward fabrication. The grade carries 63.0% minimum nickel with 28.0 to 34.0% copper, a pairing that withstands seawater, hydrofluoric acid, and caustic alkalis. UNS N04400 is a solid-solution alloy; heat treatment won't harden it, only cold work does. Ductility holds from cryogenic temperatures up to about 480 °C, with a density of 8.8 g/cm³. These coils are commonly used in the marine, oil and gas, and chemical industries.
We supply these Monel coils from our own slitting lines, cutting any width between 3 mm and 2000 mm. Material leaves annealed to ASTM B127 in a choice of finishes and edges, with a test certificate covering every dispatch.
We provide ASTM B127 coils of Nickel Alloy 400 in the annealed mill condition, slit to width from ready stock across six surface finishes and four edge options.
| Parameter | Details |
|---|---|
| Standard | ASTM B127 / ASME SB-127 |
| General Requirements | ASTM B906 |
| Thickness | 0.03 mm to 5 mm |
| Width | 3 mm to 2000 mm |
| Width Tolerance | ±0.1 mm on narrow slit widths |
| Coil ID | 150 mm to 610 mm |
| Coil OD | Up to 1800 mm |
| Condition | Annealed (standard mill condition) |
| Surface Finish | BA (Bright Annealed), 2B, Matte, Matte PVC, Skin Pass (cold-rolled); hot rolled, annealed and pickled (HR coils) |
| Supply Form | Hot Rolled and Cold Rolled |
| Edge | Slit edge, Mill edge, Deburred edge, Round edge |
Copper sets this grade apart from most nickel alloys. UNS N04400 coils pair 28.0 to 34.0% copper with a 63.0% nickel floor, the pairing behind its resistance to reducing acids. The nominal composition of UNS N04400 to ASTM B127 appears below.
| Element | Composition (%) |
|---|---|
| Nickel (plus cobalt) | 63.0 min |
| Copper (Cu) | 28.0 to 34.0 |
| Iron (Fe) | 2.50 max |
| Manganese (Mn) | 2.00 max |
| Carbon (C) | 0.30 max |
| Silicon (Si) | 0.50 max |
| Sulphur (S) | 0.024 max |
Annealed Monel Alloy 400 coil meets a 485 MPa minimum tensile strength with 35% elongation, so it slits, presses, and deep-draws readily. Yield minimums apply at the qualifying gauge; figures below 0.51 mm stay indicative, since ASTM B127's yield requirements do not apply under that thickness.
| Property | Value (Annealed) |
|---|---|
|
Tensile Strength, minimum
|
485 MPa (70 ksi) |
|
Yield Strength (0.2% offset), minimum
|
195 MPa (28 ksi) |
|
Elongation in 50.8 mm (2 in.), minimum
|
35% |
International buyers can match UNS N04400 coils to their regional designation below. The 2.4360 coils we stock correspond to the designations shown for cross-reference.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | N04400 |
| Europe (EN) | NiCu30Fe |
| Germany (W.Nr) | 2.4360 |
| Japan (JIS) | NW4400 |
| United Kingdom (BS) | NA 13 |
These four industries widely use the Monel coils we slit. Each one picks the grade for corrosion performance in chloride or reducing media rather than for raw strength.
Shipyards and offshore contractors use Monel 400 coil in pump sleeves, fastener stock, and splash-zone sheathing. The alloy resists flowing seawater and chloride stress corrosion cracking, so parts keep their section in saline service that pits stainless steel. In stagnant seawater, fouling and localised pitting can occur, so flowing service suits the grade best.
Chemical plants convert Monel 400 coils into heat exchanger strips, vessel linings, and heating coils for caustic duty. The nickel-copper matrix resists the hydrofluoric and sulphuric acid streams that strip lesser alloys, and sodium hydroxide is handled across a wide concentration range.
Oil and gas operators form Alloy 400 coil into valve trim, instrument components, and downhole sealing parts for sour wells. Monel 400 is among the alloys listed for sour service under NACE MR0175 / ISO 15156, and slit widths feed forming and machining lines directly.
Desalination plants specify UNS N04400 coil for evaporator parts, brine heater components, and intake screens in hot, chloride-heavy water. Resistance to chloride cracking keeps this hardware running between overhaul cycles, which matters wherever an unplanned shutdown drains plant output.
As a Monel 400 Coils stockist and exporter, we dispatch from Mumbai and Taloja in wooden cases or on pallets, ready for sea freight.
| Parameter | Details |
|---|---|
| Packaging | Wooden cases, pallet packing |
| Incoterms | FOB, CIF, CFR, EXW Mumbai |
| Dispatch Points | Mumbai and Taloja warehouses |
| Standard Lead Time | 4 to 5 days |
| Urgent Dispatch | 2 to 3 days |
| Payment Terms | Advance, credit, LC |
| Certification | EN 10204 Type 3.1 standard; Type 3.2 on request |
Monel 400 Coils price in India is around ₹1,700 to ₹3,000 per kg, or roughly $20 to $35 per kg for export buyers. The rate tracks nickel and copper LME movements, and thickness, width, finish, and quantity all affect the final price. Bulk orders earn volume discounts, so call or WhatsApp us for today's rate.
We supply Monel 400 coils from 0.03 mm to 5 mm thick and slit to any width between 3 mm and 2000 mm, held to ±0.1 mm on narrow slit widths. Coil ID runs 150 mm to 610 mm, with OD up to 1800 mm.
Yes, Monel 400 coils serve as heating elements in caustic soda and hydrofluoric acid duty. Resistance to alkalis and reducing acids keeps elements intact where stainless heating surfaces fail early. For hypochlorite duty, a nickel-chromium-molybdenum grade such as Hastelloy C276 is the correct choice instead.
The lead time for Monel 400 coil orders is 4 to 5 days from ready stock. Urgent dispatch leaves in 2 to 3 days.
The price of Monel 400 coils per kg is around ₹1,700 to ₹3,000 in India, or roughly $20 to $35 for export buyers. The final figure moves with thickness, width, finish, quantity, and LME rates.
You can source these coils in India from us at Riddhi Siddhi Impex. Our Mumbai warehouse holds Alloy 400 coils in stock for immediate dispatch. As a Monel 400 Coil supplier, stockist, and exporter, we serve buyers across India and overseas. Phone or WhatsApp us; get a quote within 24 hours.
