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Updated July 2026 · 7 min read · UK Japanese knife specialists

AUS-10 Steel Explained: Is It a Good Knife Steel?

If you have been comparing Japanese-steel knives, you have almost certainly seen "AUS-10" on the spec sheet and wondered what it actually means for the blade in your hand. The short answer: AUS-10 is one of the best stainless steels in its price class — a high-carbon Japanese stainless that takes a very keen edge, holds it for a long time, and resists rust well enough for everyday kitchen use.

It is the steel behind our Minato range, so this guide is written from genuine familiarity with how it performs. Below we cover what AUS-10 is, whether it is worth buying, how it compares to VG10 and AUS-8, and which Minato knives use it.

What is AUS-10 steel?

AUS-10 is a Japanese stainless steel produced by Aichi Steel. It sits at the top of the "AUS" family (AUS-6, AUS-8, AUS-10), where the number roughly tracks the carbon content — so AUS-10 is the hardest and most wear-resistant of the three. It is a stainless steel, which means enough chromium to resist rust, combined with enough carbon to be hardened to a keen, long-lasting edge.

Here is the typical composition and what each element does:

Element	Typical amount	What it does
Carbon	~0.95–1.10%	Lets the steel harden and hold an edge
Chromium	~13–14.5%	Corrosion resistance (makes it "stainless")
Vanadium	~0.1–0.27%	Finer grain, better wear resistance
Molybdenum	~0.1–0.3%	Strength and pitting resistance

Hardened and heat-treated properly, AUS-10 typically reaches around 58–61 HRC on the Rockwell hardness scale — hard enough for a thin, keen edge, but not so hard that the blade becomes brittle in normal kitchen use. Our Minato knives sit around the 60 HRC mark.

Is AUS-10 a good knife steel?

Yes — for a kitchen knife, AUS-10 is genuinely good, and it is a big step up from the softer stainless used in most supermarket knives. The honest way to judge any knife steel is on four things: how sharp it gets, how long it stays sharp, how easy it is to look after, and how easy it is to re-sharpen. AUS-10 scores well on all four.

In plain terms: a well-made AUS-10 blade behaves like a premium Japanese-steel knife should. It glides through an onion or a tomato skin, it stays usably sharp for weeks of home cooking, and it wipes clean without fussing. The only real "rules" are the same as for any good Japanese-steel knife — hand-wash and dry it, keep it off bone and frozen food, and store it on a rack or in a block rather than loose in a drawer.

AUS-10 vs VG10 vs AUS-8

These are the three stainless steels you will meet most often when shopping for a Japanese-steel knife. They are closer than the marketing suggests — all three are good — but there are real differences in feel.

Steel	Hardness	Edge retention	Ease of sharpening
AUS-10	~58–61 HRC	Very good	Easy–moderate
VG10	~60–61 HRC	Very good–excellent	Moderate
AUS-8	~57–59 HRC	Good	Very easy

AUS-10 vs VG10: These two are the closest match. VG10 (often paired with a Damascus cladding) usually holds an edge a touch longer and is the more famous name; AUS-10 gets nearly there, is a little more forgiving to re-sharpen, and often comes in at a friendlier price. For most home cooks the difference is small — pick the knife whose size, handle and price suit you. Our full VG10 steel guide goes deeper on that side.

AUS-10 vs AUS-8: Same family, but AUS-10 has more carbon, so it is harder, holds its edge longer and takes a finer edge. AUS-8 is softer, tougher and even easier to sharpen, which is why it is popular on budget and outdoor knives. If your priority is a keen, long-lasting kitchen edge, AUS-10 is the upgrade. There is more detail in our AUS-8 steel guide.

The best AUS-10 knives to buy (UK)

Every knife in our Minato range is forged from AUS-10 steel, so it is the simplest way to try the steel for yourself. Here are the picks we would point you to first, plus a VG10 alternative if you would rather have that steel.

The Minato santoku — our most popular AUS-10 blade.

Looking after an AUS-10 knife

AUS-10 is low-maintenance, not no-maintenance. Because it is a hard, thin steel taken to a fine edge, a little care keeps it performing for years. Hand-wash and dry it straight after use rather than leaving it wet or putting it in the dishwasher; use a wooden or plastic board, never glass or stone; and keep it off bone and frozen food, which can chip a keen edge.

When it eventually loses its bite, a whetstone at around 1000 grit (then a finer 3000–6000 grit to finish) brings it back easily — AUS-10 responds well and does not need any special equipment. Our step-by-step whetstone sharpening guide walks you through it, and a diamond sharpening steel (included in the Minato box set) keeps the edge true between sharpenings.

AUS-10 steel FAQ

Is AUS-10 better than VG10?

Neither is clearly "better" — they are close cousins. VG10 usually holds an edge a fraction longer and is the more famous name, while AUS-10 is a little easier to re-sharpen and often more affordable. Both take a keen edge and resist rust well, so most home cooks should choose the knife whose size, handle and price suit them rather than agonising over the steel.

Does AUS-10 steel rust?

It is stainless, so it resists rust far better than a traditional carbon steel — but no stainless is fully rust-proof. Leaving an AUS-10 blade wet, or letting acidic food dry on it, can cause spotting over time. Rinse and dry it after use and it will stay clean for years.

How hard is AUS-10 on the Rockwell scale?

With a good heat treatment, AUS-10 usually lands around 58–61 HRC. Our Minato knives are around 60 HRC — hard enough for a thin, long-lasting edge while still being practical to sharpen at home.

Is AUS-10 easy to sharpen?

Yes. It is harder than basic kitchen steel, so it takes a little longer than a soft supermarket knife, but it sharpens readily on an ordinary whetstone and does not need diamond plates or professional equipment. A 1000-grit stone to set the edge and a finer stone to finish is all it takes.

Which knives use AUS-10 steel?

In our range, the entire Minato series is AUS-10 — from the 7" santoku and 8" chef knife to the boxed sets. Many of our other lines (Aiko, Haruta, Riku) use VG10 instead, so if a listing does not say AUS-10, check the specification.

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