Hydrochloric Acid (HCl) service
Material Compatibility

Carbon Steel for Hydrochloric Acid (HCl)

Is Carbon Steel the right valve material for Hydrochloric Acid (HCl)? The engineering rating, the conditions that limit it, and the better alternatives.

Not Recommended

Is Carbon Steel compatible with Hydrochloric Acid (HCl)?

For Hydrochloric Acid (HCl) (HCl) valve service, Carbon Steel is not recommended — not recommended. Rapid attack at all concentrations.

Better materials for Hydrochloric Acid (HCl)

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

Hastelloy C-276ExcellentHastelloy B-3ExcellentPTFE-linedExcellentRubber-lined (natural rubber)GoodPVDF-linedGood

All rated materials for Hydrochloric Acid (HCl)

Hastelloy C-276ExcellentHastelloy B-3ExcellentPTFE-linedExcellentRubber-lined (natural rubber)GoodPVDF-linedGoodSS 316LNot RecommendedDuplex 2205Not Recommended
Reviewed by Materials Engineering, Vajra Industrial SolutionsDiscipline: Valve Metallurgy & Materials SelectionLast reviewed: 20 June 2026

Connected Engineering

Materials
A216 WCB Carbon SteelHastelloy C-276
Tools
Material Compatibility

Need Carbon Steel valves for Hydrochloric Acid (HCl)?

Send your concentration, temperature and pressure — we confirm Carbon Steel suitability for Hydrochloric Acid (HCl) (or recommend an upgrade) and supply with full certification.

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Engineering references

Hydrochloric Acid (HCl) service guideFull compatibility, valves & standardsCarbon Steel compatibilityEvery fluid this material handlesCompatibility AtlasThe full material x fluid matrix