Blade Steel

AUS-8 - Blade Steel

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Steel Composition

carbon 0.75 %
chromium 14.00 %
molybdenum 0.49 %
manganese 1.00 %

AUS-8 is a popular steel choice for producing high-quality, premium knives. This Japanese stainless steel is made primarily by Aichi Steel and achieves a high degree of hardness with its carbon content and moderate chromium levels. AUS-8 is well-regarded for its excellent balance between durability, edge retention, and corrosion resistance. Its ability to respond well to heat treatment and maintain good toughness makes it an outstanding choice for everyday carry (EDC) knives.

What are the Advantages of AUS-8?

AUS-8 is a premium EDC knife steel that delivers an excellent balance between hardness, sharpness, and durability. Due to its optimal response to heat treatment, AUS-8 knives can reach high hardness levels, enhancing their edge retention and overall durability. This advantage ensures that the knives remain sharp over extended periods, reducing the need for frequent re-sharpening.

Additionally, AUS-8 is notably easy to sharpen, accommodating both seasoned professionals and knife enthusiasts. Its user-friendliness during sharpening adds to its popularity in diverse knife applications.

Disadvantages of AUS-8 for Knives

While AUS-8 offers several advantages, it is not without its drawbacks. Its corrosion resistance is lower compared to some higher-end stainless steels. This means that it needs additional care, particularly when used under harsh conditions or in damp environments, to prevent corrosion.

Moreover, its wear resistance is adequate but not as high as some premium steels. For those engaging in heavy-duty tasks, this might translate to more frequent sharpening sessions.

Steel Rating

Steels with good edge retention will stay sharp longer, reducing the need for frequent sharpening

Edge Retention

3/6 Points

Toughness is the steel's ability to absorb energy and deform without breaking


3/6 Points

Corrosion Resistance measures how well the steel can resist rust and oxidation

Corrosion Resistance

4/6 Points

Sharpenability refers to how easily a knife blade can be sharpened to its desired edge


5/6 Points

This is a relative measure based on typical market values. The actual price can vary widel


5/6 Points

A higher HRC number typically indicates a harder steel, which can hold a sharper edge


57 - 58 HRC
Please be aware that this rating should be understood as a comparative measure. It's simply a rough estimation in relation to other knife steels.

Is AUS-8 Rust Resistant?

When it comes to rust resistance, AUS-8 provides decent performance under normal conditions. However, it lacks the superior rust resistance found in steel grades with higher chromium content, such as VG-10 or S30V. Exposure to harsh elements like salt water or acidic substances can quickly diminish its resistance. Nonetheless, regular maintenance and proper oiling can significantly enhance the steel’s resistance to corrosion and rust.

How Hard is AUS-8?

AUS-8 typically scores 57-58 on the Rockwell Hardness Scale (HRC), which is indicative of a well-balanced hardness-to-toughness ratio. This level of hardness allows the blade to maintain its edge effectively under typical usage conditions.

Its respectable HRC rating also helps the blades endure physical strain and flexing during use without chipping, an essential attribute for EDC knives expected to perform various tasks.

For What is AUS-8 Recognized for?

AUS-8 enjoys a solid reputation in the knife-making industry for its approachable price-point and good performance. It is not the premium top-tier steel but stands as a dependable choice that balances cost and quality effectively. In the EDC community, AUS-8 is trusted for being a reliable and hardworking material, suitable for an extensive array of cutting tasks.


In summary, AUS-8 is a commendable selection for EDC knives, meeting the necessary standards of durability, sharpness, and maintenance ease. Its slight vulnerability to rust can be managed with careful upkeep, which safeguards its long-term function and performance. For those seeking a good mix of performance and affordability in their knife steel, AUS-8 is a worthwhile consideration. Regular care will ensure that it remains a reliable companion in various cutting tasks.