Caustic Soda (NaOH) service
Material Compatibility

Nickel 200/201 for Caustic Soda (NaOH)

Is Nickel 200/201 the right valve material for Caustic Soda (NaOH)? The engineering rating, the conditions that limit it, and the better alternatives.

Excellent

Is Nickel 200/201 compatible with Caustic Soda (NaOH)?

For Caustic Soda (NaOH) (NaOH) valve service, Nickel 200/201 is excellent — an excellent choice. Best all-round material for hot concentrated NaOH. Industry standard.

Better materials for Caustic Soda (NaOH)

Higher-rated options for this service, from the compatibility data.

PTFE-linedExcellentCarbon SteelGoodMonel 400GoodRubber-lined (natural rubber/EPDM)Good

All rated materials for Caustic Soda (NaOH)

PTFE-linedExcellentCarbon SteelGoodMonel 400GoodRubber-lined (natural rubber/EPDM)GoodSS 316LFairAluminium alloysNot Recommended
Reviewed by Materials Engineering, Vajra Industrial SolutionsDiscipline: Valve Metallurgy & Materials SelectionLast reviewed: 20 June 2026

Connected Engineering

Materials
A216 WCB Carbon SteelMonel 400
Tools
Material Compatibility

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Engineering references

Caustic Soda (NaOH) service guideFull compatibility, valves & standardsCompatibility AtlasThe full material x fluid matrix