Amigo Impex is an Incoloy 825 flanges manufacturer, supplier, stockist and exporter based in Mumbai, India. Established in 2013, our company forges these flanges to ASTM B564 and the ASME counterpart SB-564 and also accepts purchase orders written against UNS N08825. Cutting, machining, threading, fabrication, testing and packing all happen in-house, keeping every production stage under one roof.
Incoloy 825 Flanges are specified where sulphuric acid, phosphoric acid, sour gas and seawater attack ordinary flange materials. The nickel-iron-chromium alloy provides the corrosion resistance required for these demanding services. The grade holds a minimum tensile strength of 586 MPa in the annealed condition. European and Japanese drawings carry designations such as W.Nr. 2.4858 or JIS NCF 825, and we accept orders written against those equivalents. Nine flange constructions cover the range: weld neck, slip-on, and blind patterns lead demand, while orifice and spectacle blind specials are forged to order. Sizes run from NPS 1/2" to 48". Classes 150# to 1500# are supplied up to NPS 24" to ASME B16.5, with Class 2500# covered to NPS 12"; NPS 26" and above follow ASME B16.47 Series A and B. In NPS 26" and above, ASME B16.47 covers welding neck and blind flanges only; other patterns in these sizes are forged to customer drawing. Larger sizes in higher classes are forged to customer drawing.
Chemical plants, offshore platforms and power stations take the largest share of our dispatches. Wooden case packing, marked heat numbers and a material test certificate to EN 10204 3.1 or 3.2 accompany every consignment, and per-kilogram pricing is confirmed once type, size and class are fixed. Full traceability from mill heat to final inspection backs every flange order we supply.
The specifications below define the manufacturing envelope for Incoloy 825 flanges at Amigo Impex, covering governing standard, nominal size range, pressure class series, facing options and documentation. Every parameter is checked against the purchase order before forging begins.
ASTM B564 governs the forged material, while separate dimensional standards fix bolt circles, thicknesses and facings for Alloy 825 Flanges. The applicable standard for a given order depends on nominal size and the regional piping code.
| Category | Standard |
|---|---|
| Material Specification | ASTM B564 / ASME SB-564 |
| Dimensions, NPS 1/2" to 24" | ASME B16.5 |
| Dimensions, NPS 26" and above | ASME B16.47 Series A & B |
| Line Blanks | ASME B16.48 |
| European and British Dimensions | EN 1092, BS 4504, BS 10, DIN |
| Material Certification | EN 10204 3.1 / 3.2 |
| Oriface Flanges | ASME B16.36 (Class 300# and above) |
The nickel-iron-chromium base, with molybdenum, copper and titanium added, lets ASTM B564 UNS N08825 flanges handle oxidising and reducing environments in one composition. Chromium gives resistance to oxidising media such as nitric acid and nitrates, nickel gives resistance to chloride stress corrosion cracking, and molybdenum with copper handles reducing acids such as sulphuric and phosphoric. Titanium, with the correct heat treatment, stabilises the alloy against intergranular attack.
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | 38.0 - 46.0 |
| Chromium (Cr) | 19.5 - 23.5 |
| Iron (Fe) | 22.0 min |
| Molybdenum (Mo) | 2.5 - 3.5 |
| Copper (Cu) | 1.5 - 3.0 |
| Titanium (Ti) | 0.6 - 1.2 |
| Manganese (Mn) | 1.00 max |
| Silicon (Si) | 0.5 max |
| Carbon (C) | 0.05 max |
| Sulphur (S) | 0.03 max |
| Aluminium (Al) | 0.2 max |
N08825 flanges are supplied in the annealed condition, and ASTM B564 sets the minimum values below. Tensile, yield and elongation figures are recorded on the mill test certificate for each heat we forge.
| Property | Minimum Value (Annealed) |
|---|---|
| Tensile Strength | 85 ksi (586 MPa) |
| Yield Strength (0.2% Offset) | 35 ksi (241 MPa) |
| Elongation in 2" | 30% |
Incoloy 825 flange equivalent grades cover the European, Japanese, British, French and Chinese designation systems. Trade enquiries frequently name Inconel 825 flanges; the label differs, yet the material remains UNS N08825 in every case.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | UNS N08825 |
| Europe (EN / W.Nr.) | W.Nr. 2.4858 / NiCr21Mo (DIN 17744) |
| Japan (JIS) | NCF 825 |
| United Kingdom (BS) | NA 16 (BS 3076 NA16) |
| France (AFNOR) | NC21FeDU |
| China (GB/T) | NS1402 |
Nine forged constructions of Alloy 825 flanges cover the piping positions below; patterns that aren't in ready stock are produced against order.
Incoloy 825 flanges leave from our Mumbai warehouse in wooden cases, crates or pallets, with machined faces individually wrapped and each piece marked with heat number, size, class and specification. Packing methods are not limited to standard export cases; boxes and bundles follow the agreed order terms. Export consignments move to the USA, the Gulf, Europe and Asia, while domestic dispatches cover all of India. Urgent orders leave within one to two days.
Every Incoloy 825 flange ships with a material test certificate to EN 10204 3.1, and 3.2 witness certification is arranged where the order specifies it. Test records combine original mill certificates with results from our in-house testing, and third-party inspection is supported on request. Amigo Impex operates under AS 9120B, PED, ISO 9001:2015 and ISO 45001:2018 certification.
Alloy 825 flanges are generally priced at approximately ₹1,000–₹3,400 per kg in India and US$14–US$45 per kg internationally. The final rate depends on flange type, nominal size, pressure class, facing, quantity, material certification, inspection, and nickel-market movements.
Contact Amigo Impex today for Alloy 825 flange pricing.
Request a Quote60–70 tonnes held in Mumbai, with urgent requirements dispatched within one to two days.
AS 9120B, PED, ISO 9001:2015 and ISO 45001:2018, with an MTC on every order.
Cutting, machining, threading, fabrication and testing all handled at our own Mumbai facility.
Original mill certificates plus our own test reports, so every batch can be traced back.
Non-standard sizes and specifications made to order.
Dispatched from Mumbai to every major Indian city, and exported to USA, Gulf, Europe, Asia
ASTM B564 covers forged Incoloy 825 flanges, and ASME SB-564 applies the same requirements under the boiler and pressure vessel code.
ASTM B564 UNS N08825 flanges contain 38.0- 46.0% nickel, 19.5- 23.5% chromium, 22.0% iron minimum, 2.5-3.5% molybdenum and 1.5-3.0% copper. Titanium, manganese, silicon, carbon, sulphur and aluminium are held to the limits in the composition table above.
An Inconel 825 flange isn't a different product; 825 belongs to the Incoloy family, and both names describe the same UNS N08825 material.
Incoloy 825 flanges are available from NPS 1/2" to 48". Classes 150# to 1500# are covered to NPS 24" and Class 2500# to NPS 12" under ASME B16.5, while NPS 26" and larger are supplied in Classes 150# to 900# under ASME B16.47. European ratings PN 6 to PN 63 are also supplied.
Amigo Impex does provide a material test certificate with every Incoloy 825 flange order, issued to EN 10204 3.1 or 3.2 as the purchase order specifies.
The maximum recommended service temperature for Incoloy 825 flanges is approximately 1000 °F (538 °C). Service above this point is not recommended because microstructural change lowers ductility and impact strength.
Weld neck, slip on, blind, socket weld, threaded, lap joint, long welding neck, orifice and spectacle blind types are all stocked or forged in Incoloy 825.
Nickel alloy 825 flanges are specified across 8 industries handling acids, sour gas and seawater.
