CPM 20CV vs CPM S30V
CPM 20CV and CPM S30V both sit at the top of the edge-retention charts and are common choices in premium production folders, but they come from different chemistries: CPM S30V leans on a heavier vanadium carbide load from Crucible’s own long-running S-series, while CPM 20CV mirrors Bohler’s M390 formula with a higher chromium and vanadium base built for maximum wear and corrosion resistance together.
Quick Verdict
These two are close at the top of the field. CPM S30V is slightly tougher and has a longer, more established production track record, while CPM 20CV offers a bit more corrosion resistance. Edge retention is essentially tied between them.
Toughness
CPM S30V has a modest toughness advantage, though neither steel is known for exceptional toughness among premium stainless steels; both are hardened to a level where chipping resistance takes a back seat to wear resistance.
Edge Retention
Essentially tied. Both are among the best edge-holding stainless steels available, with CPM 20CV's heavier chromium-vanadium carbide load matching CPM S30V's long-proven wear resistance.
Corrosion Resistance
CPM 20CV holds a real advantage here, with roughly 20% chromium versus S30V's 14%, making it the better choice for wet, humid, or marine environments.
Heat Treat
CPM 20CV requires a notably higher, more precise austenitizing temperature than CPM S30V, and generally benefits more from professional-grade heat-treating equipment to reach its full potential.
Grinding
Comparable. Both are demanding, high-carbide steels that are slower to grind and sharpen than most other steels in this database, generally requiring diamond or CBN abrasives to sharpen efficiently.
Best-Use Scenarios
Choose CPM S30V for premium EDC folders where a slight edge in toughness and a long, proven track record matter.
Choose CPM 20CV when maximum corrosion resistance is a priority alongside top-tier edge retention, such as marine or heavy-moisture environments.