ATS-314 vs. VG-10 Steel for Hair Cutting Shears: What's the Difference?

If you've been researching professional hair cutting shears with any depth, you've likely encountered two steel names that come up most often in serious conversations: ATS-314 and VG-10. Both are legitimate, high-quality Japanese alloys used by professional shear makers. Both are meaningfully superior to the generic stainless steel found in mass-market scissors. But they are not identical, and understanding the differences between them helps you make a more informed decision about what's going into the tool you'll use every day.

What ATS-314 Is

ATS-314 is a proprietary stainless steel alloy developed specifically for applications requiring a fine, durable cutting edge. Its composition features high carbon content for hardness, high chromium for corrosion resistance, and additions of molybdenum and vanadium that refine the carbide structure of the steel — improving both wear resistance and the precision with which the edge can be ground. When properly heat-treated and cold-forged, ATS-314 achieves a Rockwell hardness of 61–63 HRC.

ATS-314 was developed with cutting tool applications specifically in mind, and its alloy balance reflects that focus. The carbide structure is optimized for grindability — meaning skilled craftspeople can produce and maintain an exceptionally fine convex edge on ATS-314 — while the hardness and toughness balance is calibrated for the repeated impact loads of professional cutting rather than for static applications like knife blades.

What VG-10 Is

VG-10 is another high-quality Japanese stainless steel, developed originally for premium kitchen knives. Its composition also features high carbon and chromium content, with vanadium and cobalt additions. VG-10 typically achieves 60–62 HRC when properly heat-treated — slightly overlapping with but generally at the lower end of the ATS-314 range. The cobalt in VG-10 contributes to its hardness and gives the steel a refined grain structure that takes a very sharp edge.

VG-10's origins in kitchen knife production mean it's optimized slightly differently than ATS-314 — more toward achieving and maintaining a very acute initial edge, and somewhat less toward the specific toughness profile required for the repeated short-stroke cutting patterns of professional haircutting. It's a fine steel for shears and is used by respected shear makers, but ATS-314 was purpose-developed for cutting tool applications in a way that VG-10 was not.

Key Differences in Practice

• Hardness: Both fall in the professional range. ATS-314 at 61–63 HRC is generally at or slightly above VG-10 at 60–62 HRC, though both exceed the 60 HRC threshold that separates professional-grade steel from mid-range alternatives.

• Toughness: ATS-314's alloy balance gives it a slight edge in toughness — resistance to chipping under the lateral and impact loads of daily cutting — which matters more in a professional high-volume environment than in a kitchen knife context.

• Grindability and edge maintenance: Both steels take and hold a fine convex edge well. ATS-314's carbide structure is particularly well-suited to the convex grinding process used in Japanese shear production, which is part of why it has become the dominant choice among serious shear makers.

• Corrosion resistance: Both provide good corrosion resistance for salon and barbershop environments. Neither requires special protective treatment beyond normal daily maintenance.

Why Ivy Ann Uses ATS-314

At Ivy Ann, we chose ATS-314 for every shear in our lineup because it was developed for cutting tool applications, achieves the hardness range we consider the professional benchmark (61–63 HRC), and has been the consistent choice of the most serious Japanese shear artisans in Sanjo — the city where our shears are handcrafted 100%. It's not the only excellent steel available, but it's the one we'd put in our own hands every day — and that's the standard we apply to everything we make.

Browse the full Ivy Ann lineup at ivyannshears.com/shop or book a free consultation at 910-769-0355.