We are Riddhi Siddhi Impex, a Mumbai-based Inconel 718 foils manufacturer, supplier, and exporter, established in 2002. We slit Alloy 718 (UNS N07718) foil in-house to ASTM B670, AMS 5596, and AMS 5597 standards, with gauges from 0.03 mm to 0.08 mm thick. EN 10204 Type 3.1 / 3.2 mill test certificates available on request and a 400-500-ton-per-month supply capacity are supported by our ISO 9001, 14001, and 45001-certified company.
Inconel 718 foils are thin-gauge flat products of a nickel-chromium superalloy that hardens through a solution treat and age cycle instead of cold work alone. Niobium at 4.75 to 5.50% forms gamma double-prime precipitates during ageing, lifting tensile strength past 1240 MPa. This specialised Inconel foil holds that strength to about 650 °C and carries a density of 8.19 g/cm³, which suits thin seals, gaskets, heat shields, and high-speed Inconel 718 foil air bearings inside engines.
As a premier Inconel 718 foil supplier, we hold stock solution annealed, so fabricators can etch, draw, or form the foil first; it doesn't reach full hardness until the ageing step.
We supply UNS N07718 foil to ASTM B670 and both aerospace specifications, precision slit to any width from 3 mm, with the finishes and edge options below.
| Parameter | Details |
|---|---|
| Standard | ASTM B670 / AMS 5596 / AMS 5597 |
| Thickness | 0.03 mm to 0.08 mm |
| Width | 3 mm to 2000 mm |
| Width Tolerance | ±0.1 mm |
| Surface Finish | BA (Bright Annealed), Matte, Skin Pass |
| Edge | Slit, Mill, Deburred, Round |
| Supply form | Cold Rolled |
Alloy 718 foil owes its age-hardening response to niobium, supported by titanium and aluminium. The full ASTM B670 limits for UNS N07718 appear below.
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | 50.0 to 55.0 |
| Chromium (Cr) | 17.0 to 21.0 |
| Iron (Fe) | Balance |
| Niobium + Tantalum (Nb+Ta) | 4.75 to 5.50 |
| Molybdenum (Mo) | 2.80 to 3.30 |
| Titanium (Ti) | 0.65 to 1.15 |
| Aluminium (Al) | 0.20 to 0.80 |
| Cobalt (Co) | 1.00 max |
| Carbon (C) | 0.08 max |
| Manganese (Mn) | 0.35 max |
| Silicon (Si) | 0.35 max |
| Copper (Cu) | 0.30 max |
| Boron (B) | 0.006 max |
| Phosphorus (P) | 0.015 max |
| Sulphur (S) | 0.015 max |
Heat treatment decides the strength of 718 foil. AMS 5596 covers the solution annealed condition, providing tensile strength of 830-965 MPa while remaining suitable for forming operations. AMS 5597 covers solution treated and aged material, where precipitation raises tensile strength to 1240 MPa minimum with 1035 MPa yield and 36 to 42 HRC. The spring temper row is indicative and certified per order.
| Condition | Tensile Strength (MPa) | Yield Strength (0.2% Offset) | Rockwell Hardness |
|---|---|---|---|
|
Solution Annealed
|
830 to 965 | 380 MPa | 100 HRB max |
|
Precipitation Hardened (Aged)
|
1240 min | 1035 MPa | 36 to 42 HRC |
|
Cold Rolled Spring Temper
|
1240 to 1585 | Certified per order | 40 to 42 HRC |
Buyers who order 718 foil by a regional designation can match it here, from Werkstoffnummer 2.4668 to GH4169.
| Standard | Correct designation |
|---|---|
| USA (UNS) | N07718 |
| Germany (W.Nr.) | 2.4668 |
| Japan (JIS) | NCF 718 |
| France (AFNOR) | NC19FeNb |
| China | GH4169 |
| British (BS) | NA 51 / HR 51 |
Inconel 718 alloy foil serves wherever a thin section must carry load through heat. These 4 industries buy most of the foil we slit.
Engine builders shape IN718 foil into thermal liners, exhaust gaskets, heat shields, and shim layers for turbine blade gap adjustment. We supply this high-performance material to AMS 5596 in the solution annealed state for high ductility and formability for complex fabrication and deep drawing.
Gas turbine seals, heat exchanger baffles, and shielding layers utilise our Inconel alloy 718 - heat-resistant alloy foil for its exceptional creep resistance in combustion atmospheres. The alloy maintains dimensional stability during prolonged operating campaigns, even at gauges under 0.1 mm.
Instrumentation diaphragms, valve sealing layers, and corrosion-resistant gaskets are cut from Alloy 718 foil for sour-service duty. The aged material resists sulphide stress cracking in well fluids, where stainless foil fails early.
Flat springs, bellows, and filter elements use spring-temper 718 foil where vibration and heat defeat standard spring steel. Precision equipment makers also order annealed foil for etched and formed miniature parts.
We dispatch Inconel 718 foils from our Mumbai and Taloja warehouses, wrapped against surface damage in wooden cases or on pallets.
| Parameter | Details |
|---|---|
| Packaging | Wooden cases, pallet packing |
| Incoterms | FOB, CIF, CFR, EXW Mumbai |
| Dispatch Points | Mumbai, Taloja |
| 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 |
Inconel 718 foils in India typically cost around ₹3,000-₹3,500 per kg, while export buyers generally pay about $35-$46 per kg, depending on thickness and finish. Thin precision gauges and aged or spring-temper supply sit at the top of the band, and nickel and niobium markets move the whole range. Call or WhatsApp us with your gauge and temper for today's rate.
Inconel 718 foils are available from 0.03 mm to 0.08 mm thick and 3 mm to 2000 mm wide, slit on our own lines to ±0.1 mm.
Inconel 718 foils are covered by ASTM B670, with AMS 5597 for solution treated and aged material and AMS 5596 for annealed aerospace supply, all under UNS N07718.
Inconel 718 foils reach full strength through a solution treat and age cycle. Ageing precipitates gamma double-prime, which lifts tensile strength past 1240 MPa at 36 to 42 HRC.
Yes, we slit Inconel 718 foils to any width between 3 mm and 2000 mm at ±0.1 mm. Custom width slitting is our core in-house service.
The maximum continuous service temperature for Inconel 718 foils is about 650 °C. The alloy also stays tough down to cryogenic temperatures.
Inconel 718 foils in India typically cost around ₹3,000-₹3,500 per kg, while export buyers generally pay about $35-$46 per kg, depending on thickness and finish for export, subject to gauge, temper, and market movement.
You can source Inconel 718 foils from us at Riddhi Siddhi Impex, a Mumbai-based manufacturer and supplier since 2002. Send your requirement on call or WhatsApp to get a quote within 24 hours.
