Is CPM 4V Steel Good Steel? Details CPM 4V steel review

What is CPM Steel 4V?

CPM 4V is a steel made from powder metal. It was produced by Crucible Industries following the Crucible Particle Metalurgy process. This was made to improve CPM 3V but is more costly and has a lower toughness.

This steel is extremely tough and wear resistant due to the combination of its chemical components. It is ideal for making knives and tools that require wear resistance, strength and toughness.

CPM4V steel Chemical composition

  • Carbon 1.35%: Enhances edge retention, hardness, and tensile strengths. It increases steel resistance to wear and abrasion as well as corrosion.
  • Chromium Cr 5.0%: Formation of Chromium carbide Increases hardness, tensile and corrosion resistance of blades.
  • Molybdenum Mo 2.95: It increases machinability, hardness.
  • Vanadium V 3.85%: It inhibits grain growth in high-temperature processing and heat treatments, which increases steel’s strength and toughness. It forms carbides, which increase wear resistance.
  • Tungsten W 0.4% Improves wear resistance, hardness, and is most commonly added to tool steel.
  • Manganese Mn 0.4%: Increases steel’s strength and hardness. The steel’s hardenability can be improved by adding more manganese to it when it is heated.
  • Silicon Si 0.80%: Increases strength, heat resistance.

Properties CPM 4V Steel

CPM 4V steel Hardness

CPM 4V hardness of 64 HRC is quite impressive. This hardness level allows knives made from this steel to have high wear resistance, great edge retention and most importantly, they don’t compromise on toughness.

CPM steel 4V steel Wear resistance

CPM 4V is a hard steel that offers great wear resistance. CPM 4V knives will remain in great shape regardless of what abrasive or adhesive conditions they are exposed to.

CPM 4V may eventually wear out due to sharpening or other wear, but they will last you a long time, perhaps even generations.

Its excellent wear resistance is due to the presence of carbon, vanadium and molybdenum.

CPM4V steel Toughness

Steel can be either hard or tough. But not both. We can conclude from the 4V hardness that it is brittle. This is false. CPM 4V has a high degree of hardness and good toughness. When used in challenging applications, 4V knives are not likely to break or chip.

CPM4V Steel Edge retention

The wear resistance of steel determines how long steel retains its sharpness. Edge retention is a measure of how long steel can retain its edge. CPM4V is extremely wear-resistant and will keep its edge for a long time. This steel does not need to be sharpened often.

The 4V range of knives will satisfy your search for a knife that doesn’t require you to sharpen it in the middle of cutting.

CPM4V steel Corrosion resistance

CPM 4V isn’t stainless steel, as the Chromium content in its composition doesn’t make it stainless. This steel is not completely rust-free, although the 5% chromium provides some protection against corrosion.

Proper care is essential to prevent rusting. This includes drying and cleaning knives.

Avoid the 4V knives if you need to use your knife in salty or humid areas.

Sharpening CPM4V steel

CPM4V is hard steel and therefore difficult to sharpen. Sharpening CPM 4V will take a lot of energy and time. You can simplify the process by using sophisticated sharpening instruments. Make sure the abrasive you use is not less than 4V.

This steel is very durable, so you won’t need to sharpen it as often.

CPM4V steel comparison to other knife steels


Both steels are produced by Crucible Industries. 4V is an upgrade to 3V steel. Both offer the same level in corrosion resistance and easy sharpness. However, they differ in two important aspects. CPM 3V has a higher toughness and CPM 4V has a better edge retention.

CPM 4V vs. LC200N

CPM 4V outperforms LC200N Steel by a large margin in edge retention, toughness and durability while LC200N Steel shines in corrosion resistanceand easy sharpness. LC200N steel is better suited to humid and salty environments, which will increase rusting.

CPM 4V vs CPM10V

CPM 4V, CPM 10V are made using the same manufacturing process. The only difference is in the composition of the alloys. CPM 10V is tougher and more suitable for knives whose applications require extra wear resistance. 10V has almost three times as much wear resistance than. Because of its low wear resistance, 4V is easier to sharpen than 10,

Is CPM4V a good knife-steel

CPM 4V is a good knife steel, according to its properties. CPM 4V has excellent edge retention, wear resistance, and toughness. These are all characteristics of a good knife steel. Its only drawback is its resistance to corrosion, but it can be maintained in a way that keeps knives made of this steel completely free from rust.

About the author

Hi, my name is Jaba Ray. I'm a knife expert and researcher. I am the creator of, your one-stop site for everything related to knives. I love people who need suitable steel or knife for their cook because I'm also a food lover. I work with a team of people who've always had a passion for knives and blades on this site.

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