We are Riddhi Siddhi Impex, one of the most trusted Incoloy 825 plate suppliers and sheet stockists in Mumbai since 2002. We stock this nickel-iron-chromium alloy to ASTM B424 / ASME SB-424 in 0.8 mm sheets and plate in heavier gauges from recognized primary mills. We are ISO 9001, 14001 and 45001 certified and ship internationally, with a supply capacity of 400 to 500 tonnes per month and EN 10204 Type 3.1 / 3.2 certificates on request.
Incoloy 825 sheets and plates are nickel-iron-chromium alloy flat products stabilised with molybdenum, copper, and titanium. The high nickel content resists chloride-ion stress corrosion cracking, while molybdenum and copper handle reducing acids such as sulphuric and phosphoric. Chromium provides oxidation resistance, and titanium reduces susceptibility to sensitisation after welding. Incoloy 825 is typically used in chemical processing equipment and oil well piping.
We stock this grade as cold-rolled sheets from 0.8 mm and hot-rolled plates in heavier gauges, 1000 to 1500 mm wide. Material ships annealed to ASTM B424, in 2B or BA finishes, each backed by a mill test certificate. Custom slitting trims sheets to your required width.
We provide ASTM B424 Incoloy 825 plate and UNS N08825 sheet in annealed condition, across two surface finishes and standard mill widths, with custom lengths cut to order.
| Parameter | Details |
|---|---|
| Standard | ASTM B424 / ASME SB-424 |
| General Requirements | ASTM B906 |
| Thickness (Sheets, CR) | 0.8 mm to 10 mm |
| Thickness (Plates, HR) | 10 mm and above |
| Width | 1000 mm, 1219 mm, 1500 mm |
| Width Tolerance | ±0.1 mm |
| Condition | Annealed (standard mill condition) |
| Surface Finish | 2B, BA (Bright Annealed) |
| Form | Hot-Rolled Plates, Cold-Rolled Sheets |
Nickel between 38 and 46% gives Alloy 825 its resistance to stress corrosion cracking, while copper at 1.5 to 3% sets it apart in sulphuric acid. The full ASTM B424 composition appears below.
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | 38.0 to 46.0 |
| Chromium (Cr) | 19.5 to 23.5 |
| Iron (Fe) | 22.0 min (balance) |
| Molybdenum (Mo) | 2.5 to 3.5 |
| Copper (Cu) | 1.5 to 3.0 |
| Titanium (Ti) | 0.6 to 1.2 |
| Manganese (Mn) | 1.0 max |
| Silicon (Si) | 0.5 max |
| Carbon (C) | 0.05 max |
| Aluminium (Al) | 0.2 max |
| Sulphur (S) | 0.03 max |
Annealed N08825 plate and sheet both meet an 85 ksi minimum, and the standard fixes yield and elongation for design work. The ASTM B424 figures appear below.
| Property | Value |
|---|---|
|
Tensile Strength, minimum
|
586 MPa (85 ksi) |
|
Yield Strength (0.2% offset), minimum
|
241 MPa (35 ksi) |
|
Elongation in 50 mm, minimum
|
30% |
|
Density (typical)
|
8.14 g/cm³ |
|
Melting Range (typical)
|
1370 to 1400 °C |
International buyers can cross-reference UNS N08825 or W.Nr 2.4858 against their own regional standard using the table below.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | N08825 |
| Europe (EN) | NiCr21Mo |
| Germany (W.Nr) | 2.4858 |
| Japan (JIS) | NCF 825 |
| France (AFNOR) | NC21FeDu |
| China (GB) | NS142 |
These 4 industries commonly use Incoloy 825 sheets and plates we supply, each drawing on the alloy's acid resistance and freedom from chloride stress corrosion cracking.
Chemical plants build reactor linings, tanks, and pickling equipment from Alloy 825 sheet where sulphuric and phosphoric acids attack lesser metals. The copper and molybdenum content holds up in reducing acids and resists pitting.
Sour-service operators specify Nickel Alloy 825 plates for downhole hardware, separators, and pressure housings exposed to hydrogen sulphide and brines. The high nickel base resists the chloride stress corrosion cracking that splits standard stainless steel in hot, saline service.
Pharmaceutical fabricators form Incoloy 825 sheet into vessels and heat exchangers that contact acidic intermediates and cleaning agents. The titanium-stabilised structure holds its corrosion resistance through repeated clean-in-place cycles.
Process engineers select Alloy 825 plates for tube sheets and condenser bodies handling seawater and acidic condensate. Its resistance to both reducing and oxidising conditions allows a single alloy to perform well in both environments.
Orders are dispatched from our Mumbai and Taloja warehouses in wooden cases or on pallets, prepared for maritime transport.
| 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 |
In India, Incoloy 825 sheets and plates are typically priced around ₹1,400-₹2,800 per kg, while international buyers generally pay around $15-$35 per kg, with premium forms up to about $40-$45 per kg. The figure tracks global nickel rates, and thickness, width, finish, and quantity all move it. Contact us for the latest quotation.
Incoloy 825 sheets and plates are covered by ASTM B424 and its ASME equivalent SB-424, with ASTM B906 for general flat-rolled requirements. These set the chemistry, mechanical minimums, and tolerances for UNS N08825.
We stock Incoloy 825 sheets from 0.8 mm to 10 mm and plates in 10 mm and above, with widths 1000 to 1500 mm. Custom thicknesses are cut to order, subject to mill availability.
The main difference is that Alloy 825 plates resist reducing acids and chloride stress corrosion cracking far better than SS 316, owing to higher nickel plus copper and titanium. SS 316 suits general service, while Incoloy 825 handles aggressive chemical environments.
We provide EN 10204 Type 3.1 and 3.2 mill test certificates with Incoloy 825 plates on request, along with material test reports. Third-party inspection can also be arranged before dispatch.
You can find a reliable Incoloy 825 sheet supplier in India at Riddhi Siddhi Impex. We provide high-quality materials tailored to your industrial needs. Our Mumbai warehouse holds ready stock for immediate dispatch. As a supplier, stockist, and exporter, we serve buyers across India and abroad, and quotes will be provided within 24 hrs.
