AICHI ACUTO440 steel for pro-level sharpness and edge retention
Lab-tested rust resistance proven to withstand 50 days submerged in water and up to 100 dishwasher cycles.
Ergonomic rounded spine for a comfortable pinch grip

Rust-Proof

ACUTO440 Steel

All Chop Styles

What’s Inside

Use & Care

Hand wash
Dry immediately after use
Sharpen every 4–6 months
Heads up: High-carbon knives may show discoloration after exposure to acidic foods and/or salt. This is purely cosmetic and different from rust, which is extremely rare.
Visit our Help Hub for more on how to use and care for this knife.

Let Us Handle the Sharpening

Mail-In Knife Sharpening (on any knife)
Free shipping, starting at $11 per knife.

Specifications

8" Chef's Knife: Blade Length: 8.26 in. / 210 mm

Total Length: 13.5 in. / 345 mm

Handle Thickness: 18 mm

Blade Height: 49 mm

Weight: 0.5 lb / 230 g

3.3" Paring Knife: Blade Length: 3.3 in. / 85 mm

Total Length: 7.6 in. / 195 mm

Weight: 0.18 lb / 84 g

Steel: AICHI ACUTO 440 (Japan)

HRC: 58±2

Country of Production: PRC

Warranty

All Misen products come with a lifetime warranty against defects. Misen will replace any defective products. Learn more about our warranty policy here and what's covered.

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2-Piece Knife Set (ACUTO440) - Blue

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8 inch Chef's Knife - ACUTO440 - New

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What are Misen’s ACUTO440 Knives made of?

Our ACUTO440 Knives are made with AICHI ACUTO440, an exceptionally corrosion-resistant Japanese high-carbon stainless steel. AICHI ACUTO440 is rust-proof, incredibly durable, and has excellent edge retention. What that means for you: less time cleaning and sharpening, more cooking.

What’s the difference between Misen’s ACUTO440 Knives and classic knives?

All of our knives are made from high-carbon stainless steel, which is what gives them their razor-sharpness and excellent edge retention. However, our ACUTO440 Knives have a much higher chromium content (about 18%), which makes them significantly more corrosion (aka rust) resistant.

Our ACUTO440 Knives also feature a rounded spine and heel (the back of the knife where the blade meets the bolster), creating a more comfortable grip over long prep sessions.

How are Misen’s ACUTO440 Knives different from other high-carbon knives?

We wanted our ACUTO440 Knives to be high-performance tools that you could still leave in the sink overnight if you needed to. That’s why our ACUTO440 Knives are made with AICHI ACUTO440, a Japanese high-carbon stainless steel that is more durable and easier to care for than other high-carbon knives, which are prone to rusting and/or chipping without proper care.

What do you mean by rust-proof?

Our ACUTO440 Knives are made with AICHI ACUTO440 steel, an exceptionally corrosion-resistant Japanese high-carbon stainless steel. Our knives have been lab-certified to withstand up to 100 dishwasher cycles, as well as 50 days of being submerged in water, without showing any signs of rust.

Can I put Misen’s ACUTO440 Knives in the dishwasher?

While our ACUTO440 Knives have been lab-certified to withstand up to 100 dishwasher cycles without showing any signs of rust, we generally recommend hand washing all of your Misen knives. Because our knives are extremely sharp, when they get jostled around in the dishwasher, the blade can cut through the soft materials that make up your dishwasher racks. Dishwashing can also damage your knives if the blade edge bangs against hard objects like flatware or pots and pans during the washing cycle.

How often should I sharpen my knives?

Whenever you start to notice your knife is slicing and dicing a little less crisply than usual, it’s time to sharpen. Although our ACUTO440 Knives can go long periods between sharpenings, we generally recommend getting them sharpened about twice a year for best performance. We also recommend regularly using a honing rod between sharpenings to keep your knife edge in good shape.

My blade has discoloration and/or staining. What is this?

While our ACUTO440 Knives are rust-proof, all high-carbon knives can experience some discoloration and/or staining with prolonged exposure to acidic foods and/or salt. This is purely cosmetic and is not the same as rust.

Why the ACUTO440 Knife Set Is Ideal for Everyday Cooking

The ACUTO440 2-Piece Knife Set in Blue gives you the two knives that handle the vast majority of kitchen tasks — a chef's knife and a paring knife — both forged from rust-proof ACUTO440 steel that holds a razor-sharp edge through daily use. The steel's corrosion resistance means less maintenance between sessions, and the matching blue handles make the set easy to spot on a busy counter or in a drawer.

If you find yourself reaching for a serrated blade or a dedicated utility knife as your cooking expands, the 3-Piece ACUTO440 Set in Blue adds exactly that without changing the look of your collection. For cooks who want a coordinated workspace, the 3-Piece Modular Knife Storage Set in Blue keeps these knives accessible and protected. Every Misen knife comes backed by a lifetime warranty against defects, so this set is genuinely built to last.

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Basically a Navy Seal

Rust-proof after 100 dishwasher cycles.

Because it’s got more chromium than standard high-carbon stainless, ACUTO440's rust resistance is a lab result, not a marketing claim.

Works Harder, Stays Sharper

Holds a razor edge through heavy prep.

At 58±2 HRC, ACUTO440 has incredible edge retention without brittleness. That means you can put off sharpening it for longer.

Questions?

Customer Reviews

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Rated 5.0 out of 5 stars

Based on 51 reviews

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Total 5 star reviews: 50

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51 reviews

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Georganna A.

Verified Buyer

I recommend this product

Rated 5 out of 5 stars

3 days ago

Perfect

Just what I needed: sharp, perfect size, easy to use. Perfect for my everyday cooking tasks.

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Emily B.

Verified Buyer

I recommend this product

Product Standouts sharp, easy-to-use, good balance

Rated 5 out of 5 stars

3 weeks ago

My New Go-To

Love the weight of the handle, easy to control and super duper sharp!

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Kirk B.

Verified Buyer

I recommend this product

Product Standouts good balance, sharp, premium materials, comfortable handle, well-priced

Rated 5 out of 5 stars

1 month ago

Must Have Knife

You’re shopping Misen because you either know or have heard the quality of their cookware, tools, and knives is exceptionally high quality. Well it is. This knife is one of the examples of an exceptional knife for your kitchen. I practically use it daily, has excellent “hand feel”, and it has been my experience over the years I’ve owned this knife, as well as the others you want for a complete set, that all their knives sharpen it a razor’s edge. So stop procrastinating and buy it, you won’t be sorry.

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Yes, this review from Kirk B. was helpful. 2 people voted yesNo, this review from Kirk B. was not helpful. 0 people voted no

Marcus W.

Verified Buyer

I recommend this product

Product Standouts sharp, easy-to-use, good balance, comfortable handle, nice weight

Rated 5 out of 5 stars

1 month ago

Great Knife Set

This is my first set of high quality kitchen knives and I love them! Very sharp and comfortable to use!

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AJR T.

Verified Buyer

I recommend this product

Product Standouts good balance, sharp, comfortable handle, easy-to-use, nice weight

Rated 5 out of 5 stars

2 months ago

Excellent knife

Love the balance and it’s keeping sharpness well. Very happy with this

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