Hastelloy · Inconel · Incoloy · Monel
Nickel alloy buttweld pipe fittings in Hastelloy C-276, Inconel 625, Incoloy 825, Monel 400, Hastelloy C-22 and other grades. ASTM B366. EN 10253-4. EN 10204 3.1 standard, 3.2 with TUV / Lloyd's on request. For the most aggressive chemical, offshore, pharmaceutical and high-temperature applications.
Ni-Mo-Cr-W. Broadest corrosion resistance — HCl, H₂SO₄, seawater, FGD, sour gas. No single acid compromises it across most concentrations.
Higher Cr (21%) than C-276 — better resistance to oxidising acids (HNO₃, hot H₂SO₄) while maintaining reducing-acid capability. Pharmaceutical, chemical synthesis.
Ti-stabilised version of C family. Outstanding thermal stability — immune to sensitisation up to 1040°C. High-temperature chemical process applications.
Ni-Cr-Mo-Nb. Exceptional strength from -196°C to 980°C. No PWHT required. Offshore, LNG, nuclear, aerospace. Widely used as overlay weld cladding.
Ni-Cr-Fe. Classic high-temperature oxidation and carburisation resistance. Nuclear plant steam generators, heat treatment equipment, chemical vapour deposition.
Ni-Cr-Co-Mo. Superior creep resistance at 980°C+. Used in gas turbine combustors, reformer headers, and industrial heating systems.
Ni-Cr-Fe-Mo-Cu-Ti. Excellent resistance to H₂S, polythionic acid, and phosphoric acid. Oil & gas sour service, phosphoric acid plants, nuclear fuel reprocessing.
Ni-Cu (70/30). Outstanding resistance to HF acid across all concentrations and temperatures. Seawater, brine, HF alkylation units, marine condensers.
| Grade | EN W.Nr. | ASTM B366 | Best For | NOT Suitable For |
|---|---|---|---|---|
| Hastelloy C-276 | 2.4819 | WPHC276 | HCl, H₂SO₄ (all conc.), seawater, FGD, sour gas | HNO₃ >50% (use C-22) |
| Hastelloy C-22 | 2.4602 | WPHC22 | Mixed oxidising/reducing acids, pharma, pesticide | High-temp H₂SO₄ without testing |
| Inconel 625 | 2.4856 | WPNIC625 | Cryogenic to 980°C, seawater, nuclear, LNG | Strong reducing acids (use C-276) |
| Inconel 600 | 2.4816 | WPNICMC | High-temp oxidation, carburisation, nuclear steam | Strong acids, seawater |
| Incoloy 825 | 2.4858 | WPNIC825 | H₂S/sour gas, H₃PO₄, polythionic acid, nuclear | Seawater pitting (use 625 or C-276) |
| Monel 400 | 2.4360 | WPMC | HF acid (all conc.), seawater, brine, marine | Oxidising acids, moist chlorine |
Nickel alloy raw material must be sourced per heat for full EN 10204 3.1 / 3.2 traceability. Please send RFQ with: grade (EN W.Nr. or trade name), standard (B366 / EN 10253-4), size, schedule, fitting type, quantity, required certificate (3.1 or 3.2), and TPI preference (TUV / Lloyd's / BV). We respond within 1 business day.
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