We are Riddhi Siddhi Impex, a Mumbai-based Alloy 20 strips manufacturer and supplier, established in 2002. We precision-slit this niobium-stabilised nickel-iron-chromium alloy in thicknesses from 0.03 mm to 5 mm, with chemistry and mechanical properties certified to ASTM A240 / ASME SB-463. Our ISO 9001, 14001, and 45001-certified facility holds around 1000 tonnes of ready stock across our full alloy range, with a monthly supply capacity of 400 to 500 tonnes.
Alloy 20 strips are thin, cold-rolled flat products of an austenitic nickel-iron-chromium alloy with added copper and molybdenum, stabilised by niobium. The copper and molybdenum resist reducing acids, especially sulphuric acid, while chromium adds oxidising resistance. Niobium at a minimum of eight times the carbon content locks up carbon, so welded parts resist intergranular corrosion. UNS N08020 also resists chloride stress corrosion cracking. It serves chemical processing, heat exchangers, and oil and gas duties.
We slit every Alloy 20 coil in-house, from 0.03 mm to 5 mm thick and any width between 3 mm and 2000 mm. Material under 4.76 mm thick and under 610 mm wide is classified as strip; wider widths ship as sheet or coil, and 4.76 mm and above as plate. Material leaves our facility in the stabilised annealed condition to ASME SB-463, with a choice of BA, 2B, Matte, HR pickled, or cold-rolled finishes and slit, deburred, or round edges. A mill test certificate ships with every order.
We provide Alloy 20 winding strips and slit coil in the stabilised annealed condition, from 0.03 mm to 5 mm thick and precision-slit to widths from 3 mm to 2000 mm, with a choice of finishes and edges. Chemistry and mechanical properties are certified to ASTM A240 / ASME SB-463.
| Parameter | Details |
|---|---|
| Standard | ASTM A240 / ASME SB-463 (formerly ASTM B463) |
| General Requirements | ASTM A480 |
| Thickness | 0.03 mm to 5 mm |
| Width | 3 mm to 2000 mm |
| Width Tolerance | ±0.1 mm on narrow slit widths |
| ID | 150 mm to 610 mm |
| OD | Up to 1800 mm |
| Condition | Stabilised annealed per ASME SB-463 |
| Surface Finish | BA (Bright Annealed), 2B, Scotch-Brite, Matte, Matte PVC, HR Pickled, Cold Rolled, Skin Pass |
| Edge | Slit edge, Mill edge, Deburred edge, Round edge |
Copper sets this grade apart. UNS N08020 strip carries 3.0 to 4.0% copper with 2.0 to 3.0% molybdenum, and together they resist sulphuric acid across a wide range of concentrations. The full composition per ASTM A240 / ASME SB-463 appears below.
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | 32.0 to 38.0 |
| Chromium (Cr) | 19.0 to 21.0 |
| Iron (Fe) | Balance |
| Copper (Cu) | 3.0 to 4.0 |
| Molybdenum (Mo) | 2.0 to 3.0 |
| Niobium + Tantalum (Nb+Ta) | 8×C min, 1.00 max |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 1.00 max |
| Carbon (C) | 0.07 max |
| Phosphorus (P) | 0.045 max |
| Sulphur (S) | 0.035 max |
Annealed N08020 strip meets a minimum tensile strength of 80 ksi. Per ASME SB-463, strip thinner than 0.38 mm carries a reduced elongation requirement of 20% minimum in 25.4 mm.
| Property | Value |
|---|---|
|
Tensile Strength, minimum
|
551 MPa (80 ksi) |
|
Yield Strength (0.2% offset), minimum
|
241 MPa (35 ksi) |
|
Elongation in 50.8 mm (2 in.), minimum
|
30% |
|
Density (typical)
|
8.08 g/cm³ (0.292 lb/in³) |
|
Melting Range (typical)
|
1385 to 1443 °C |
International buyers can cross-reference UNS N08020 strips, or W.Nr 2.4660, against their own regional standard below. Every Alloy 20 slitting coil we slit meets these designations.
| Country / Standard | Designation |
|---|---|
| USA (UNS) | N08020 |
| Europe (EN) | NiCr20CuMo |
| Germany (W.Nr) | 2.4660 |
| Japan (JIS) | No direct equivalent |
| Cast equivalent (ACI) | CN-7M |
These are the applications that specify most of the Nickel Alloy 20 strips we slit. Buyers select the grade for its sulphuric acid resistance, ability to withstand chloride stress corrosion cracking, and stabilised welds.
Chemical plants use Alloy 20 slit coil for gaskets, bellows, and heat exchanger parts exposed to sulphuric and phosphoric acids. The copper and molybdenum hold up in reducing acids that corrode stainless steel, and niobium keeps welded seams free of intergranular damage.
Pharmaceutical fabricators form Alloy 20 strips into mixing components and heat exchanger parts that contact acidic intermediates and cleaning agents. The stabilised austenitic structure holds its corrosion resistance through repeated clean-in-place cycles, so process fluids stay uncontaminated.
Fabricators use Alloy 20 winding strips in heat exchanger tubesheets, linings, and vessel parts handling hot acidic media. Resistance to both reducing and oxidising conditions lets one material serve duties that would otherwise need two.
Refinery operators specify UNS N08020 strips for acid-service sealing parts and separator components. The high nickel base resists chloride stress corrosion cracking, while copper counters the reducing acids formed in refining.
Export orders leave Mumbai and Taloja, packed in wooden cases or on pallets.
| 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 |
Alloy 20 Strips price in India is around ₹1,300 to ₹1,800 per kg, or roughly $15 to $21 per kg for international buyers. The figure tracks global nickel rates, and thickness, width, finish, and quantity all affect the final price. Call or WhatsApp for today's rate.
Alloy 20 strips are covered by ASTM A240 and ASME SB-463 (formerly ASTM B463) for UNS N08020 plate, sheet, and strip, with ASTM A480 for general flat-rolled requirements.
Alloy 20 strips carry 32.0 to 38.0% nickel, 19.0 to 21.0% chromium, 3.0 to 4.0% copper, and 2.0 to 3.0% molybdenum, with iron as the balance, per ASTM A240 / ASME SB-463. Niobium is added at a minimum of eight times the carbon content to stabilise the alloy.
We slit Alloy 20 strips from 0.03 mm to 5 mm thick and to any width between 3 mm and 2000 mm, held to ±0.1 mm on narrow slit widths.
Alloy 20 strips are used in chemical and petrochemical processing, pharmaceutical and food processing, heat exchanger fabrication, and oil and gas processing, wherever sulphuric and phosphoric acid resistance is needed.
Yes, we precision-slit Alloy 20 strips to any width from 3 mm to 2000 mm on our own lines, holding ±0.1 mm on narrow widths. Custom slitting is our core service, with slit, mill, deburred, or round edges.
You can source Alloy 20 strips in India from us at Riddhi Siddhi Impex. Our Mumbai warehouse holds N08020 strip for immediate dispatch. As a manufacturer, stockist, and exporter, we serve buyers across India and overseas, with a quote within 24 hours.
