Compatibility Atlas
Material Compatibility Reference
Monel 400 — Fluid Compatibility
Which industrial fluids Monel 400 valves can handle — rated across 5 process media with engineering notes. The compatibility reference for specifying Monel 400 body and trim.
What fluids is Monel 400 compatible with?
Monel 400 is rated across 5 industrial fluids in our compatibility data. It performs well in Hydrofluoric Acid (HF), Oxygen (O₂ - Industrial and Medical Grade), Caustic Soda (NaOH), Chlorine (Cl₂), Crude Oil. Full ratings and notes below — always confirm against concentration, temperature and velocity.
Material grades & metallurgy
Excellent2 fluids
Hydrofluoric Acid (HF)Industry standard for HF alkylation service. Resists anhydrous and aqueous HF.
Oxygen (O₂ - Industrial and Medical Grade)Excellent oxygen compatibility - used for high-pressure GOX service.
Good3 fluids
Caustic Soda (NaOH)Good for hot caustic service - preferred where Nickel 200 is cost-prohibitive.
Chlorine (Cl₂)Good for dry chlorine; not for wet.
Crude OilFor high H₂S content.
Reviewed by Materials Engineering, Vajra Industrial SolutionsDiscipline: Valve Metallurgy & Materials SelectionLast reviewed: 20 June 2026
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