AUS-10 Steel: Is It Good? HRC, Equivalents & vs VG-10

The Cooking Guild - Aug 27, 2026

AUS-10 is a good kitchen knife steel. It is a Japanese high-carbon stainless from Aichi Steel, hardens to 58-61 HRC, resists rust well and sharpens easily. It holds an edge close to VG-10 while chipping less, and its nearest equivalent is 440C.

Is AUS-10 Steel Good?

Yes, and it is one of the best-balanced steels you can put in a kitchen knife at any price. It will not beat a powder-metallurgy super steel on paper, but it wins on the trade-offs that decide how a knife feels after a month of real cooking. We build our entire Feather Forge line around an AUS-10 core, so we have opinions. Here is how it scores on the four things that matter.

Edge retention

Good to very good. AUS-10 will not match SG2 or S35VN for sheer wear resistance, but it holds a working edge far longer than the 3Cr13, 5Cr15 and X50CrMoV15 steels found in most Western knife blocks. Expect several weeks of home cooking between whetstone sessions, with a quick pass on a honing rod in between.

Toughness

Very good for its hardness. This is where AUS-10 quietly beats VG-10: it is less prone to chipping when it meets something hard, which makes it a more forgiving steel for cooks who are not delicate with their knives.

Corrosion resistance

Strong. With 13-14.5% chromium, AUS-10 shrugs off acidic foods and wet boards. It is not immune (no knife steel is), so rinse and dry after use, but it will not develop a patina the way carbon steel does.

Ease of sharpening

Excellent. AUS-10 responds quickly to a standard whetstone, raises a burr predictably and polishes to a clean, toothy edge. Beginners find it far friendlier than harder super steels that need diamond plates.

What Is AUS-10 Steel?

AUS-10 is a high-carbon stainless steel produced by Aichi Steel in Japan. It sits at the top of the AUS family (AUS-6, AUS-8, AUS-10), with the number loosely tracking carbon content. Where AUS-8 carries roughly 0.75% carbon, AUS-10 pushes to about 1.0%, which is what lets it be hardened further and hold a keener edge for longer.

Typical composition of AUS-10:

Carbon: 0.95-1.10% - hardness and edge retention
Chromium: 13-14.5% - corrosion resistance (anything over ~10.5% qualifies as stainless)
Molybdenum: 0.10-0.31% - toughness and hardenability
Vanadium: 0.10-0.27% - fine grain structure, a crisper edge
Nickel: up to 0.49% - a little extra toughness
Manganese and silicon under 1% each; sulphur and phosphorus kept very low

Feather Forge 8 inch chef knife with AUS-10 steel core and 73-layer feather Damascus cladding

AUS-10 Hardness: What HRC to Expect

Properly heat-treated AUS-10 lands at 58-61 HRC on the Rockwell hardness scale. Our Feather Forge blades are hardened to around 60 HRC. That is the sweet spot for a kitchen knife: hard enough to take a 12-15 degree edge and keep it through weeks of daily prep, but not so hard that the edge micro-chips on a stray bone or a drop into the sink. Push AUS-10 past 61 HRC and you start trading toughness for very little extra edge life; keep it under 58 and it behaves like a much cheaper steel.

What Is AUS-10 Steel Equivalent To?

There is no exact one-to-one match, but three steels get you close, and which one you compare against changes the answer.

AUS-10 vs 440C

This is the closest equivalent, and metallurgists often describe AUS-10 as "440C with vanadium". Carbon and chromium are near-identical. The vanadium is the difference you feel: it refines the grain, so AUS-10 comes off the stone finer and stays that way slightly longer. Toughness is comparable. If a spec sheet says 440C and you were hoping for AUS-10, you are not far off.

AUS-10 vs 10Cr15CoMoV

10Cr15CoMoV is the cobalt-enriched core in our Dynasty Series, and it is essentially a VG-10 analogue rather than an AUS-10 one. It edges AUS-10 on wear resistance thanks to the cobalt; AUS-10 edges it on toughness. Both land around 60 HRC, so in a home kitchen the practical difference is small and geometry matters more.

AUS-10 vs X50CrMoV15

X50CrMoV15 is the German workhorse steel in most European knife blocks, run at 56-58 HRC. AUS-10 is harder, takes a thinner edge and holds it noticeably longer. The German steel is tougher in an absolute sense and more forgiving of abuse, which is why it is ground at a wider angle.

AUS-10 vs VG-10

This is the comparison everyone asks about, because both steels are Japanese, both are stainless and both land at roughly 60 HRC. VG-10 (from Takefu) adds cobalt and a touch more chromium, which gives it slightly better wear resistance and edge retention on paper. AUS-10 answers with better toughness and a lower risk of micro-chipping, plus it is easier to bring back on a stone.

In daily use the two are close enough that heat treatment and blade geometry matter more than the steel name. If you are hard on your knives, AUS-10 is the safer choice. If you want the last few percent of edge life and you baby your blades, VG-10 edges it.

AUS-10 vs AUS-8

AUS-8 is the softer, cheaper sibling, usually hardened to 57-59 HRC. It sharpens even faster than AUS-10 and is tough enough for pocket knives and budget kitchen knives, but it dulls noticeably sooner. For a knife you use every day, the step up to AUS-10 is worth it: roughly 25% more carbon translates to a meaningfully longer-lasting edge with no real penalty in maintenance.

AUS-10A, AUS-10V and the Other AUS-10 Names

You will see AUS-10 written several ways on product pages, and the variation causes more confusion than it should.

AUS-10A is the same steel. The "A" is a mill designation used by Aichi Steel, and knife makers use AUS-10 and AUS-10A interchangeably. Do not pay extra for the letter.
AUS-10V is a marketing label some brands use to highlight the vanadium content that AUS-10 already has. Treat the published composition and hardness as the real spec, not the suffix.
AUS10 / AUS 10 written without the hyphen is the same steel again. Spelling varies; the metallurgy does not.

What actually changes performance between two AUS-10 knives is heat treatment, blade geometry and finishing - not which of these names the seller printed on the box. That is why we publish the hardness we hit rather than leaving it at "high carbon stainless".

Why We Use AUS-10 in Feather Forge

A Damascus knife is only as good as its core, because the core is the only steel that ever touches food. The 73 layers of feather-pattern Damascus on a Feather Forge blade do two jobs: they add toughness around the hard core, and the etched surface breaks suction so slices fall away instead of sticking. The AUS-10 core does the cutting.

We chose it over VG-10 for toughness, because a knife with a 99-day home trial has to survive real kitchens, and over budget stainless because we wanted an edge that still bites after a month. The result is a blade that behaves like a Japanese knife on the board and like a Western knife when you forget to baby it.

Feather Forge 8" Chef Knife - the all-rounder
Feather Forge 7" Santoku - shorter, flatter, ideal for smaller boards
Feather Forge 7" Nakiri - the vegetable specialist
Feather Forge 7" Bunka - a santoku with a tip built for precision

Feather Forge complete knife set with AUS-10 steel cores and olive burl handles

How to Care for an AUS-10 Knife

AUS-10 asks very little, but a few habits will keep the edge and the pattern looking new for decades.

Hand wash and dry immediately. Never the dishwasher: the heat, detergent and rattling will damage any fine edge and handle.
Cut on wood or soft plastic. Glass, stone and ceramic boards dull a 60 HRC edge in days.
Hone weekly, sharpen monthly. A ceramic or steel honing rod realigns the edge; a 1000/3000 grit whetstone restores it. Hold 12-15 degrees.
Do not twist through bone. Use a cleaver built for the job and keep the AUS-10 blade for slicing, dicing and chopping.
Store it on a magnetic strip or in a block. Loose in a drawer, the edge loses to the other cutlery every time.

Try AUS-10 Steel in Your Own Kitchen

Steel charts only get you so far. The way to know whether AUS-10 is the right steel for you is to cook with it. Every Feather Forge knife comes with a 99-day home trial, so you can prep, sharpen and live with the blade before you decide, and each one is backed by a free lifetime guarantee. Every blade is hand sharpened and oiled before it ships. Explore the full Feather Forge collection or browse all of our Japanese chef knives.

AUS-10 Steel FAQ

Is AUS-10 a good steel for a chef knife?

Yes. It combines 58-61 HRC hardness, strong corrosion resistance, better toughness than VG-10 and easy sharpening. For a chef knife that gets daily use, it is one of the best-balanced stainless steels available.

What is AUS-10 steel equivalent to?

The closest equivalent is 440C, which shares its carbon and chromium content but lacks the vanadium that refines AUS-10's grain. VG-10 and 10Cr15CoMoV are the nearest Japanese and Chinese performance equivalents.

Is AUS-10 better than AUS-8?

For kitchen knives, yes. AUS-10 has more carbon, hardens higher and holds an edge noticeably longer. AUS-8 is slightly tougher and cheaper, which suits pocket knives and entry-level blades.

Is AUS-10A the same as AUS-10?

Yes. AUS-10A is Aichi Steel's own designation for the same alloy, and knife makers use the two names interchangeably. Judge the knife on its published hardness and geometry, not the letter after the number.

Does AUS-10 steel rust?

It is highly rust-resistant thanks to 13-14.5% chromium, but not rust-proof. Rinse and dry after use and it will stay clean; leave it wet for days and small spots can form, which a little baking soda paste removes.

Shop the range: Chef Knives - every blade hand sharpened and oiled before it ships, 99-day home trial, free lifetime guarantee.

Keep reading: Carbon Steel Knife Care: Daily Routine, Rust & Patina