Hydrogen Sulphide (H₂S - Sour Gas) service
Material Compatibility
NACE MR0175 qualified WCB (hardness controlled) for Hydrogen Sulphide (H₂S - Sour Gas)
Is NACE MR0175 qualified WCB (hardness controlled) the right valve material for Hydrogen Sulphide (H₂S - Sour Gas)? The engineering rating, the conditions that limit it, and the better alternatives.
Excellent
Is NACE MR0175 qualified WCB (hardness controlled) compatible with Hydrogen Sulphide (H₂S - Sour Gas)?
For Hydrogen Sulphide (H₂S - Sour Gas) (H₂S) valve service, NACE MR0175 qualified WCB (hardness controlled) is excellent — an excellent choice. Mandatory - Brinell hardness ≤200 HBW, Rockwell C ≤22 HRC, CE ≤0.43 per NACE MR0175.
Better materials for Hydrogen Sulphide (H₂S - Sour Gas)
Higher-rated options for this service, from the compatibility data.
All rated materials for Hydrogen Sulphide (H₂S - Sour Gas)
Reviewed by Materials Engineering, Vajra Industrial SolutionsDiscipline: Valve Metallurgy & Materials SelectionLast reviewed: 20 June 2026
Connected Engineering
Standards
Failure Modes
Services
Need NACE MR0175 qualified WCB (hardness controlled) valves for Hydrogen Sulphide (H₂S - Sour Gas)?
Send your concentration, temperature and pressure — we confirm NACE MR0175 qualified WCB (hardness controlled) suitability for Hydrogen Sulphide (H₂S - Sour Gas) (or recommend an upgrade) and supply with full certification.
Products