CPM 20CV is a high-end stainless powder steel used in premium folders. It is the American equivalent of Böhler’s M390.
CPM 20CV Steel at a Glance
| Type | Powder metallurgy (PM) steel |
|---|---|
| Made by | Crucible (USA) |
| Typical hardness | 59-62 HRC |
| Key elements | Carbon about 1.9%, chromium about 20%, molybdenum about 1%, vanadium about 4%, tungsten about 0.6% |
| Edge retention | 9/10 (excellent) |
| Toughness | 3/10 (modest) |
| Rust resistance | 9/10 (excellent) |
| Ease of sharpening | 3/10 (hard) |
| Best for | High-end EDC, low maintenance |
Ratings are relative 1 to 10 scores for typical factory heat treatments. See how CPM 20CV ranks against 46 other steels in our Knife Steel Chart.
What Is CPM 20CV Steel?
20CV combines high chromium and vanadium in a powder steel. That gives lots of hard carbides for wear resistance while staying highly stainless.
CPM 20CV Steel Properties
- Edge retention: Excellent.
- Toughness: Modest.
- Rust resistance: Excellent.
- Ease of sharpening: Hard. Use diamond or CBN stones.
CPM 20CV Equivalents and Alternatives
M390 and CTS-204P are essentially the same steel.
CPM 20CV vs Other Steels
CPM 20CV vs CTS-204P
CPM 20CV and CTS-204P perform very similarly. Choose based on price, the knife design and the maker’s heat treatment. Read our CTS-204P guide.
CPM 20CV vs CPM S35VN
Compared with CPM S35VN, CPM 20CV holds an edge longer and resists rust better. CPM S35VN is tougher and is easier to sharpen. Read our CPM S35VN guide.
CPM 20CV vs CPM S110V
Compared with CPM S110V, CPM 20CV is slightly tougher and is easier to sharpen. CPM S110V holds an edge slightly longer. Read our CPM S110V guide.
Is CPM 20CV Steel Good for Knives?
Yes, if you want an edge that lasts and a blade that barely rusts. Use diamond stones to sharpen it.
Pros:
- Excellent edge retention
- Excellent rust resistance
- Polishes beautifully
Cons:
- Hard to sharpen
- Lower toughness
Knives That Use CPM 20CV Steel
- CPM 20CV folding knives
- M390 folding knives: the same steel under Böhler’s name
Makers sometimes change blade steels between versions, so check the listing to confirm the steel before you buy.
Frequently Asked Questions
Is CPM 20CV steel stainless?
Yes. CPM 20CV is a stainless steel, though no knife steel is completely rust proof. Wipe it dry after use.
How hard is CPM 20CV steel?
Knives in CPM 20CV are usually heat treated to around 59-62 HRC.
Is CPM 20CV easy to sharpen?
Hard. Diamond or CBN stones work best.