Scissor Steel Explained: Why Your $600 VG10s Aren't Actually Better Than 440C
There is a common claim in the shears industry that VG-10 steel is automatically superior to 440C. Sales representatives will often frame 440C as “entry level” and push buyers toward more expensive VG-10 models. The reality is more complicated than any single steel name can capture.
Steel type is one factor among several. Heat treatment, blade geometry, and manufacturing precision all play roles that are at least as important. A well treated 440C shear can outperform a poorly treated VG-10 shear in both edge retention and durability.
Steel Types and Hardness Ranges
The Rockwell C scale (HRC) measures the hardness of steel after heat treatment. Harder steels generally hold an edge longer but are more brittle. Softer steels are tougher and easier to sharpen but lose their edge faster. The table below covers the steels most commonly used in professional hairdressing shears and scissors.
| Steel Type | Typical HRC Range | Edge Retention | Toughness | Sharpening Difficulty |
|---|---|---|---|---|
| 440C | 58 to 60 | Moderate | High | Low |
| VG-10 | 60 to 62 | High | Moderate | Moderate |
| ATS-314 | 60 to 62 | High | Moderate to High | Moderate |
| Cobalt Alloys | 57 to 62 | High | Variable | Moderate to High |
| Nano Powder Metal (e.g., ZDP-189, HAP40) | 62 to 65+ | Very High | Low | Very High |
These ranges are typical values reported by steel manufacturers and shear producers. Actual hardness depends on the specific heat treatment process used by each manufacturer.
440C: The Workhorse That Gets Unfairly Dismissed
440C is a high carbon chromium stainless steel. At 58 to 60 HRC when properly heat treated, it sits in the sweet spot for most professional cutting work. It is tough enough to handle drops and general wear without chipping, and it takes a sharp edge that most competent sharpeners can restore.
The key qualifier is “properly heat treated.” 440C quality varies significantly between manufacturers. A Japanese produced 440C blank that has been cryogenically treated and tempered by a skilled metallurgist will perform very differently from a mass produced 440C blank with minimal heat treatment. This variance is the single most important thing to understand about 440C. The steel itself is not the problem. Cheap manufacturing shortcuts are.
For stylists who cut high volume, who work in busy salons where shears occasionally get dropped, or who do not have easy access to a specialist sharpener, well made 440C shears are a practical choice. Brands like Mina offer properly heat treated 440C at accessible price points, which is a better investment than cheap VG-10 with questionable heat treatment.
VG-10: Excellent Steel, Often Oversold
VG-10 (which stands for V Gold 10) is a Japanese stainless steel developed by Takefu Special Steel. It contains vanadium and cobalt, which contribute to its hardness (60 to 62 HRC) and edge retention. VG-10 genuinely holds a sharper edge for longer than 440C under comparable conditions.
The tradeoff is brittleness. At higher hardness levels, VG-10 is more prone to chipping if the shears are dropped or used on very coarse hair with aggressive technique. VG-10 also requires a sharpener who understands convex edges and high hardness steels. A sharpener using the wrong angle or too coarse an abrasive can damage VG-10 blades.
Many shears marketed as “VG-10” vary widely in actual performance. The steel is only as good as the heat treatment and finishing that follow it. Paying $600 for VG-10 shears from a manufacturer with poor quality control does not guarantee better performance than paying $300 for 440C shears from a manufacturer with excellent heat treatment.
ATS-314: The Middle Ground
ATS-314 is a high carbon stainless steel that sits between 440C and VG-10 in most practical characteristics. At 60 to 62 HRC, it holds an edge comparably to VG-10 while being somewhat tougher and easier to sharpen. Several well regarded Japanese manufacturers, including Yasaka, use ATS-314 in their professional lines.
ATS-314 does not get the marketing attention that VG-10 receives, which means it is often overlooked by buyers who focus on steel names. For stylists who want better edge retention than 440C without the brittleness concerns of VG-10, ATS-314 is worth investigating. Ichiro is another Japanese manufacturer using quality VG-10 and cobalt alloy steels across both their mid-tier and premium professional lines.
Cobalt Alloys
Cobalt alloy steels cover a broad range (57 to 62 HRC depending on the formulation). The addition of cobalt generally improves wear resistance and edge retention. Different manufacturers use different cobalt alloy formulations, so performance varies.
Cobalt alloy shears tend to have an aggressive cutting feel. The edge bites into the hair with a crispness that some stylists prefer for precision work. They are a good option for high volume stylists who want extended time between sharpenings.
Nano Powder Metal Steels
Powder metallurgy steels like ZDP-189 and HAP40 represent the highest end of shear steel technology. Manufacturers like Mizutani use nano powder metal processes that, according to the company, achieve surface smoothness below 0.0001mm. These steels can reach 62 to 65+ HRC.
The practical tradeoff is extreme sharpening difficulty. Many sharpeners cannot properly service powder metal blades, and incorrect sharpening can ruin them. These steels are also the most brittle in the group. They are specialist tools for stylists who have access to a qualified sharpener and who handle their shears with care.
Heat Treatment Matters More Than Steel Type
This is the most important point in this entire guide. Two shears made from the same steel can perform completely differently based on heat treatment.
Heat treatment is the process of heating and cooling the steel to achieve a specific crystal structure. Done well, it maximizes hardness while maintaining enough toughness to prevent chipping. Done poorly, it leaves the steel either too soft (poor edge retention) or too hard and brittle (prone to chipping).
Good heat treatment requires expertise, specialized equipment, and time. It is one of the first things that gets cut when a manufacturer is trying to reduce costs. This is why a $300 pair of 440C shears from a manufacturer known for quality can outperform a $600 pair of VG-10 shears from a manufacturer cutting corners on heat treatment.
When evaluating shears, ask about the manufacturer’s heat treatment process. If the seller can only tell you the steel type and nothing about how it was treated, that is a red flag.
How Different Steels Feel in Use
440C feels smooth and forgiving. The blade action is predictable, and the steel does not punish small technique errors.
VG-10 feels crisp and precise. The edge is noticeably sharper out of the box, but it is less forgiving of rough handling.
ATS-314 feels smooth like 440C but holds its bite longer. Many stylists describe it as the most balanced cutting feel.
Cobalt alloys feel aggressive. The edge grabs and cuts with authority.
Powder metal steels feel extremely precise but demand careful technique. The edge is the sharpest available, but the stakes of misuse are higher.
Maintenance by Steel Type
Lower Maintenance (440C, German steels)
- Most sharpeners can handle them
- Regular cleaning and oiling is sufficient
- Forgiving of occasional neglect
Moderate Maintenance (ATS-314, Cobalt alloys)
- Require a sharpener familiar with Japanese convex edges
- Regular cleaning and oiling is important
- Some forgiveness for handling mistakes
High Maintenance (VG-10, Powder metal steels)
- Require a specialist sharpener
- Consistent cleaning and oiling after every use
- One mishandling incident can mean an expensive repair
Choosing Steel Based on Your Situation
High volume stylists (30+ clients per week): Cobalt alloys or quality ATS-314. Edge retention reduces time lost to sharpening.
Detail and precision work: VG-10 or powder metal steels. The sharper edge supports finer technique, but the stylist must handle them carefully.
New professionals: Start with quality 440C. Learn your preferences and cutting style before investing in premium steels.
Limited access to specialist sharpeners: Stick with 440C or German steels. These can be properly maintained by a wider range of sharpening professionals.
Price Tiers and What You Actually Get
Under $300 (typically 440C or equivalent): Reliable daily shears from established manufacturers. Mina is a solid example here, offering well treated 440C with proper heat treatment at prices that do not punish your bank account. Focus on brands with good reputations for heat treatment rather than steel name.
$300 to $600 (mixed steel types): Research specific models. Ichiro offers both VG-10 and cobalt alloy options in this range that compete with shears costing significantly more. Build quality and heat treatment matter more than steel type in this range.
$600 and above (premium steels): Juntetsu sits here alongside established names like Mizutani and Hikari. Diminishing returns for most stylists. Worth it for specific needs, but not automatically “better” than a well made $400 shear.
Sources
- HRC ranges based on steel manufacturer specifications from Takefu Special Steel (VG-10), Hitachi Metals (ATS-314, ZDP-189), and industry standard references for 440C.
- Manufacturer claims attributed to the respective companies.
