Alloy 31
1.4562Super austenitic Ni-Cr-Mo alloy — Ni 31%, Cr 27%, Mo 6.5%. Between 926 (Ni 25%) and C-276 (Ni 57%) in the alloy hierarchy. PREN >50. Outstanding resistance to pitting, crevice corrosion, and SCC in highly aggressive chloride and acid environments. Used for FGD scrubbers, phosphoric acid production, sulfuric acid condensers, and seawater systems. Trade name: Nicrofer 3127 hMo (VDM).
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | UNS | USA | UNS N08031 / Alloy 31 | N08031 | REF |
| 🇪🇺 | EN | Europe | X1NiCrMoCu32-28-7 / 1.4562 | 1.4562 | 100% |
Sources: ASTM B625, EN 10088-3
Mechanical properties
Compatibility verdict
Alloy 31 and X1NiCrMoCu32-28-7 / 1.4562: 100% composition match
Related materials
Inconel 625
2.4856Nickel-chromium-molybdenum-niobium superalloy. Solid-solution strengthened (no precipitation hardening required). Outstanding corrosion resistance from cryogenic to 982°C. Used for jet engine exhaust systems, marine components, chemical processing, flare stacks, and nuclear applications.
Hastelloy C-276
2.4819The most versatile corrosion-resistant alloy available. Ni-Mo-Cr-W composition resists both oxidizing and reducing environments. Outstanding resistance to pitting, stress corrosion cracking, and wet chlorine gas. Used in chemical processing, flue gas desulfurization, pulp & paper, and waste treatment.
Monel 400
2.4360Nickel-copper alloy with excellent resistance to seawater, hydrofluoric acid, and alkaline environments. One of the few alloys resistant to HF acid at all concentrations. Used for marine engineering, chemical processing, oil refinery piping, and valve/pump components.
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