CPM-S30V is a premium powder metallurgy stainless steel produced by Crucible Industries. It is a milestone in knife history, as it was the first steel ever developed specifically for high-end knife blades rather than for industrial tools or bearings.
It was created in collaboration with legendary knifemaker Chris Reeve and served as the industry benchmark for "super steels" for over a decade.
Key Characteristics
Excellent Edge Retention: S30V contains a high volume of vanadium carbides, allowing it to hold a sharp edge much longer than classic steels like 154CM or 440C.
High Corrosion Resistance: With 14% Chromium, it is a true stainless steel and handles moisture and daily use with very little maintenance.
Superior Sharpness: The "CPM" process ensures a fine, uniform grain structure, which allows the blade to take a very aggressive, "toothy" edge that is excellent for slicing.
Moderate Toughness: While it is very hard (58–61 HRC), it is famously a bit more "chippy" than its successor (S35VN). If the edge hits a hard object, it is more likely to develop micro-chips than to roll.
Difficult to Sharpen: It is significantly harder to sharpen than budget steels. You will need diamond or high-quality ceramic stones to maintain the edge effectively.
Chemical Composition
Carbon (C): 1.45% (High for hardness and edge retention)
Chromium (Cr): 14.00% (For rust resistance)
Vanadium (V): 4.00% (The "secret sauce" that gives it superior wear resistance)
Molybdenum (Mo): 2.00%
Common Applications
High-End Production Knives: It is the "standard" premium steel for brands like Benchmade (e.g., the Bugout, 940 Osborne), Spyderco (e.g., Paramilitary 2), and Zero Tolerance.
Custom Folders: A favorite for makers who want a reliable, recognizable, high-performance stainless steel.
CPM-S30V vs. CPM-S35VN
In 2009, Crucible released S35VN as an "upgrade" to S30V.
S35VN added Niobium to make the steel tougher and easier to sharpen/polish.
S30V is still widely used today because it is slightly cheaper for manufacturers while offering nearly identical edge-holding performance.