Determining the popular knife steels can vary based on trends, preferences, and applications. However, as of recent times, the following five knife steels are widely regarded for their popularity, performance, and versatility:

S30V Steel

Developed by Crucible Industries, S30V is a premium stainless steel known for its excellent edge retention, corrosion resistance, and toughness. It’s commonly used in high-end folding and fixed-blade knives.

D2 Steel

D2 is a tool steel known for its high wear resistance and edge retention. It’s favored for its ability to hold up well in demanding cutting tasks and is often used in hunting knives, survival knives, and high-performance folding knives.

VG-10 Steel

VG-10 is a Japanese stainless steel known for its exceptional edge retention, corrosion resistance, and ease of sharpening. It’s frequently used in kitchen knives and high-quality folding knives.

154CM Steel

Developed by Crucible Industries, 154CM is a premium stainless steel known for its excellent edge retention, corrosion resistance, and toughness. It’s commonly used in high-end folding knives and has similar properties to S30V steel.

AUS-8 Steel

AUS-8 is a Japanese stainless steel known for its good balance of edge retention, toughness, and corrosion resistance. It’s often used in mid-range folding knives, outdoor knives, and everyday carry (EDC) knives due to its affordability and performance.

These steels are popular choices among knife enthusiasts and manufacturers due to their combination of desirable properties for various cutting tasks and environments. However, it’s essential to note that there are many other high-quality knife steels available, and the popular steel often depends on individual preferences and specific usage requirements.