Nandini Steel is an ISO 9001:2015 certified stockist and supplier of nickel alloys since 2003, holding 12 grades ex-stock in Mumbai with EN 10204 3.1/3.2 mill test certificates and full heat-to-cast traceability. The range covers Incoloy 800 and 825, Inconel 600, 601, 625 and 718, Hastelloy C276, C22, C2000 and X, and Alloy 20 and 28 for sour service, mixed acids and high-temperature duty.
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Nickel alloy supplier for Incoloy, Inconel and Hastelloy grades
A nickel alloy supplier earns the business on two things: holding genuine mill material ex-stock, and knowing which of the Incoloy, Inconel, Hastelloy, Alloy 20 and Alloy 28 grades actually fits a given acid, temperature or sour-service duty. Nandini Steel has supplied nickel-alloy sheet, plate and coil out of Mumbai since 2003, ex-stock for immediate dispatch to 36 plus export countries, with EN 10204 3.1/3.2 mill test certificates on every order. Incoloy 800, Alloy 28 and Hastelloy plate sit inside our ISO 9001:2015 certified specialty scope (Cert No. 1283438), alongside 904L.
Incoloy grades: 800 and 825
Incoloy 800 is a nickel-iron-chromium alloy valued for its oxidation resistance and strength at sustained high temperature, and it is one of the grades named in our ISO 9001:2015 certified specialty scope. Incoloy 825 (UNS N08825, Werkstoff 2.4858) is a Ni-Fe-Cr alloy with 38 to 46 percent nickel, 2.5 to 3.5 percent molybdenum and 1.5 to 3 percent copper, titanium-stabilized for weldability. Its combined resistance to both reducing and oxidizing acids is what gets it specified over 316L and 904L in mixed-acid and sour-gas duty, and it conforms to NACE MR0175 and ISO 15156 for sour service. We stock Incoloy 825 as plate, sheet and coil, to ASTM B424 and ASME SB-424.
Inconel grades: 600, 601, 625, 718
Inconel 600 and Inconel 601 are nickel-chromium alloys developed for oxidation and corrosion resistance at high temperature, with 601 adding aluminum for better scaling resistance in the most severe heat. Inconel 625 is a nickel-chromium-molybdenum alloy with broad resistance across both high-temperature and aqueous corrosive service, available ex-stock as plate and sheet. Inconel 718 is age-hardenable, giving it higher strength than the other Inconel grades and making it the choice where mechanical load, not just corrosion, drives the specification. Note that Inconel and Incoloy name two different alloy families, which the FAQ below covers directly.
Hastelloy grades: C276, C22, C-2000, X
Hastelloy C276 is the benchmark nickel-molybdenum-chromium alloy for aggressive reducing and oxidizing media, including wet chlorine and sour process streams, and it sits inside our ISO 9001:2015 certified specialty scope. Hastelloy C22 improves on C276 in certain oxidizing and localized-corrosion conditions, while Hastelloy C-2000 adds copper for better resistance in sulfuric acid specifically. Hastelloy X is a nickel-chromium-iron-molybdenum alloy built for high-temperature oxidation and creep resistance rather than wet-corrosion duty, so it belongs in a different application bracket from the C-series. Nickel-alloy sheet from this group is supplied to ASTM B168 and plate to ASTM B575, each with full mill traceability.
Alloy 20 and Alloy 28 for sulfuric acid
Alloy 20 is a nickel-chromium-molybdenum-copper alloy developed specifically for sulfuric acid handling, holding up across a wider range of acid concentration and temperature than standard austenitic stainless steel. Alloy 28, also known as Sanicro 28, is part of our ISO 9001:2015 certified specialty scope and is selected for mixed-acid and sulfuric-acid service where 904L's iso-corrosion limits are exceeded but a full nickel-base alloy is not yet required. Both grades are commonly specified for acid-regeneration, fertilizer and chemical-processing plant, and we supply them ex-stock with EN 10204 3.1/3.2 mill test certificates.
How to pick a nickel alloy
Picking a nickel alloy starts with three questions: what is the corrosion mechanism (sour service, sulfuric acid, mixed acid, or high-temperature oxidation), what is the service temperature, and does the specification call out NACE MR0175 or ISO 15156. Sour-gas and reducing or oxidizing mixed-acid duty points to Incoloy 825. Sulfuric acid specifically points to Alloy 20, Alloy 28 or 904L depending on concentration and temperature. High-temperature oxidation and creep push the choice toward Inconel 601 or Hastelloy X rather than a wet-corrosion alloy. PREN is a useful screening number across stainless and super-austenitic grades, but once you move into the Ni-Fe-Cr and Ni-Mo-Cr families it stops being the deciding factor, since resistance to reducing acids and sour gas depends on the full alloy chemistry, not pitting resistance alone. Our guide to nickel alloys walks through the full selection logic grade by grade.
Browse nickel alloys
