We are Riddhi Siddhi Impex, a Mumbai-based Monel 400 Foils manufacturer and supplier, established in 2002. We slit nickel-copper Alloy 400 foil to ASTM B127 / ASME SB-127 and AMS 4544 in thicknesses from 0.03 mm to 0.08 mm. Our ISO 9001, 14001, and 45001-certified firm carries ready stock and a monthly supply capacity of 400 to 500 tonnes, backed by EN 10204 Type 3.1 / 3.2 certificates upon request.
Monel 400 foils are thin, cold-rolled sections of a nickel-copper alloy holding at least 63.0% nickel and 28.0 to 34.0% copper. This solid-solution grade is not hardenable by heat treatment, so it strengthens through cold work. The high nickel and copper content prevents attacks from hydrofluoric acid, seawater and reducing conditions that corrode stainless steel. UNS N04400 also keeps its ductility to subzero temperatures, which suits precision shims and formed parts. These Monel Foils are used in oil and gas, marine applications, and more.
We process every Alloy 400 foil in-house on our own slitting lines. Material leaves in soft annealed condition to ASTM B127, slit to any width between 3 mm and 2000 mm. Buyers can specify BA, 2B, or Matte surfaces with slit, deburred, or round edges. A mill test certificate ships with every order.
We provide ASTM B127 Monel 400 foil in soft annealed condition, in thicknesses from 0.03 mm to 0.08 mm and precision-slit widths from 3 mm to 2000 mm.
| Parameter | Details |
|---|---|
| Standard | ASTM B127 / ASME SB-127, AMS 4544 |
| Thickness | 0.03 mm to 0.08 mm |
| Width | 3 mm to 2000 mm |
| Width Tolerance | ±0.1 mm |
| Condition | Soft / Annealed |
| Surface Finish | BA (Bright Annealed), 2B, Matte, Matte PVC |
| Edge | Slit edge, Mill edge, Deburred edge, Round edge |
| Supply Forms | Cold Rolled |
Nickel and copper define this grade. UNS N04400 foil carries at least 63.0% nickel with 28.0 to 34.0% copper, and this pairing gives the alloy its resistance to reducing acids and seawater. The full composition to ASTM B127 appears below.
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | 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 |
Soft annealed Alloy 400 foil pairs a 480 MPa minimum tensile strength with 35% elongation, so it forms, bends, and draws without cracking. The yield minimum applies to the qualifying gauge, so figures for foil below 0.51 mm are indicative.
| Property | Value |
|---|---|
|
Tensile Strength, minimum
|
480 MPa (70 ksi) |
|
Yield Strength (0.2% offset), minimum
|
195 MPa (28 ksi) |
|
Elongation in 50 mm, minimum
|
35% |
International buyers can cross-reference UNS N04400 foil against their regional standard below. The 2.4360 foil we slit matches every designation listed, since all name the same nickel-copper alloy.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | N04400 |
| Europe (EN) | NiCu30Fe |
| Germany (W.Nr) | 2.4360 |
| Japan (JIS) | NW 4400 |
| United Kingdom (BS) | NA 13 |
These 4 industries specify the Alloy 400 foils we slit. Buyers select the grade for its resistance to hydrofluoric acid, seawater, and reducing environments, with strength held from cryogenic to moderate temperatures.
Chemical plants use Monel alloy 400 foils for gaskets, diaphragms, and shielding exposed to hydrofluoric and sulphuric acid. The nickel-copper matrix is resistant to reducing acids that corrode stainless steel, and a thin foil forms cleanly around seals and instrument parts.
Alloy 400 foil is specified by marine fabricators for seals, linings, and sensor housings in seawater service. UNS N04400 resists flowing seawater, pitting, and chloride stress corrosion cracking, proven in saltwater service where stainless steel fails.
Electronics engineers use Monel foil for EMI shielding, resistance components, and precision shims. The alloy combines corrosion resistance with stable electrical behaviour, and slitting to ±0.1 mm feeds automated forming and stamping lines without trimming.
Oil and gas operators use Nickel Alloy 400 foil in instrument protection, valve trim shims, and downhole sealing parts in reducing chloride-bearing environments. The grade holds up against sour conditions and brine, and precision-slit foil suits tight clearance work.
Export orders leave Mumbai and Taloja, packed in wooden cases or on pallets 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 / 3.2 on request |
Monel 400 Foils price range in India is around ₹1,600 to ₹2,600 per kg. In the USA, it is generally $29 to $52 per kg. The figure tracks global nickel and copper rates, and thin-gauge foil carries a rolling premium, so thickness, width, and finish all move it. Call or WhatsApp us for today's rate and volume discounts.
Monel 400 foils are covered by ASTM B127 / ASME SB-127 for nickel-copper alloy (UNS N04400) plate, sheet, and strip. For aerospace use, AMS 4544 also applies.
We slit Monel 400 foils from 0.03 mm to 0.08 mm thick and to any width between 3 mm and 2000 mm, held to ±0.1 mm on width. Finish and edge follow your order.
Yes, we precision-slit Monel 400 foils to any width from 3 mm to 2000 mm on our own lines, holding ±0.1 mm. Custom slitting is our core service.
We supply Monel 400 foils in BA, 2B, Matte, and Matte PVC finishes. Edges can be slit, milled, deburred, or rounded, specified with your order.
Yes, Monel 400 foil resists seawater, caustic alkalis, and reducing acids including hydrofluoric and sulphuric acid. It also resists stress corrosion cracking in chloride environments, making it good for marine and chemical service.
You can source Monel 400 foils in India from us at Riddhi Siddhi Impex. Our Mumbai warehouse holds N04400 foil on the shelf for immediate dispatch. As a manufacturer, stockist, and exporter, we serve buyers across India and overseas. Get a quote within 24 hours.
