EN 10253-2 Type B fittings in Inconel, Hastelloy, Monel, and Alloy 825 — for extreme corrosion resistance, high-temperature service, and applications where stainless steel reaches its performance limits.
Broadest-use nickel alloy. 9% Mo + Nb. High strength, corrosion resistance across a wide pH range. Subsea, offshore, marine, aerospace. Filler ERNiCrMo-3.
Al₂O₃ oxide scale — best oxidation resistance of the Inconel family. Industrial furnaces, thermal processing, carbon black, calcination. Filler ERNiCrFe-11.
Co solid-solution strengthening. Highest creep strength among Inconels. Gas turbine hot section, steam reformers, AUSC 700°C+ power plants. Filler ERNiCrCoMo-1.
Widest corrosion resistance of any commercial alloy. 16% Mo + W. Strongest in reducing environments. Wet scrubbers, HCl service, strong acids. Filler ERNiCrMo-4.
Higher Cr (21%) than C-276 (16%) — superior for oxidising + reducing mixed environments. FGD scrubbers, wet chlorine gas, mixed acid. Filler ERNiCrMo-10.
No tungsten — best thermal stability of C-family at 650–1040°C. No μ/P-phase precipitation. High-temp reducing acid service. Filler ERNiCrMo-7.
Only commercial alloy immune to hydrofluoric acid at all concentrations. NiF₂+CuF₂ fluoride film. HF alkylation, UF₆ processing, saltwater piping. Stress-relief 870–900°C mandatory for HF service. Filler ERNiCu-7.
38–46% Ni, 2.5–3.5% Mo, 1.5–3% Cu. NACE MR0175 SCC resistance. Sour gas, H₂SO₄, H₃PO₄. Cu addition for reducing acid resistance. Filler ERNiCrMo-3.
| Alloy | EN No. | Primary Strength | Choose When |
|---|---|---|---|
| Inconel 625 | 2.4856 | Broad corrosion + strength | Subsea, marine, mixed media, high strength |
| Inconel 601 | 2.4851 | Oxidation resistance to 1200°C | Industrial furnaces, thermal processing |
| Inconel 617 | 2.4633 | Creep strength to 1100°C | Gas turbines, AUSC power plant steam |
| Hastelloy C-276 | 2.4819 | Broadest corrosion range | Reducing acids, scrubbers, HCl |
| Hastelloy C-22 | 2.4602 | Mixed oxidising + reducing | FGD, chlorinated + oxidising environments |
| Hastelloy C-4 | 2.4610 | Thermal stability at 650–1040°C | High-temp reducing acid, no sigma risk |
| Monel 400 | 2.4360 | HF immunity, all concentrations | HF alkylation, fluorine service, saltwater |
| Alloy 825 | 2.4858 | NACE + reducing acid + sour gas | H₂SO₄, H₃PO₄, sour gas, seawater |
EN 10253-2 Type B. EN 10204 3.1. PMI (XRF) on all nickel alloy orders. NACE MR0175. Contact us with UNS or EN number, size schedule, and delivery location.
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