Understanding the Properties of Steel

• Hardness (HRC): Measured on the Rockwell scale (HRC), this indicates the steel's ability to resist deformation. A higher HRC value means the steel can be ground to a finer edge and retains its sharpness longer.
• Edge Retention: A direct consequence of hardness and the steel's composition. It describes the knife's ability to remain sharp during use.
• Toughness: The steel's resistance to sudden impacts that can cause chipping or breaking. There is often a necessary compromise between high hardness and high toughness.
• Corrosion Resistance: The ability to resist rust and stains. A high proportion of the element chromium is crucial for this property.
• Sharpenability: How easily a sharp edge can be restored to the knife. Harder steels typically require more effort to sharpen.

Viretta's Knife Series: A Steel for Every Need

Our product range is built around various series, each using a specific type of steel optimized for its intended purpose. Here's a detailed overview of the steels we use and where you can find them.

Classic Series: 5Cr15MoV – The Reliable Workhorse

Our Classic Series is designed to be a robust and reliable tool for everyday kitchen work. At the heart of this series is 5Cr15MoV steel, a balanced stainless steel alloy known for its exceptional toughness and ease of use.

• Properties: With a hardness of approximately 57 HRC, this steel is extremely resistant to chipping and breaking. It is highly corrosion-resistant and can be effortlessly re-sharpened again and again. Its properties are comparable to the renowned German steel X50CrMoV15.
• Perfect for: Home cooks looking for a reliable, durable, and low-maintenance knife for all everyday tasks. It is an extremely functional choice that combines classic Western design with modern materials.

Shojin Suna & Aira Series: 10Cr15CoMoV – The Hidden Gem

In our renowned Shojin Suna and Shojin Aira series, we use 10Cr15CoMoV steel as the core of the beautiful Damascus-style blades. This steel is often considered a direct equivalent to Japanese VG-10, as it has a nearly identical chemical composition and delivers equally high performance.

• Properties: With a high carbon content and a hardness of approximately 62 HRC, this steel offers excellent and long-lasting sharpness. The addition of cobalt, molybdenum, and vanadium ensures both abrasion resistance and high rust resistance.
• Perfect for: The ambitious home cook who wants to upgrade to a knife with Japanese-inspired precision and an impressive Damascus pattern (67 layers for Suna and 3 layers for Aira, respectively) – but at a more accessible price.

Shojin Kashi Series: SG2 Powder Steel – The Ultimate Performance

At the pinnacle of our range is the Shojin Kashi Series, forged from Japanese SG2 powdered steel. This is not a traditional forged steel, but a product of advanced powder metallurgy, where the steel is produced from ultra-fine powder under extreme pressure. This results in an incredibly pure and dense microstructure.

• Properties: SG2 can achieve extreme hardness of up to 64 HRC. Combined with a high vanadium content, this provides almost unparalleled edge retention. An SG2 knife remains laser-sharp for an incredibly long time and is also impressively rust-resistant.
• Perfect for: The uncompromising perfectionist, professional chef, or collector who wants only the absolute best. SG2 is for those who view their knife as a precision instrument where only the best performance is acceptable.

Comparison of Viretta's Steel Types

For a quick overview, here's a comparison of our selected steel types regarding the most important parameters:

Other notable steel types

In addition to our preferred steel types, there are a number of other recognized steel types on the market. Here's how they relate to our range:

X50CrMoV15: A German steel often used by Wüsthof. It is known for its good balance and is comparable in performance to 5Cr15MoV, which we use in our Classic Series.
AUS-8: A popular Japanese steel in the budget class. It is easy to sharpen but does not retain its sharpness nearly as long as 10Cr15CoMoV or VG-10.
CPM-S35VN: An American powdered steel that offers an excellent balance. Its all-round properties are very similar to those of VG-10.
M390: Like SG2, this "super steel" is known for its exceptional edge retention. However, due to its extreme hardness, it is often more difficult to sharpen.

Which Viretta steel is right for you?

Your choice depends on your culinary ambitions and your budget.

• For reliable daily use: Our Classic Series with 5Cr15MoV steel is the perfect choice. You get a sharp, incredibly durable, and easy-to-maintain knife.
• For an affordable upgrade to high performance: Choose a knife from the Shojin Suna or Shojin Aira series with 10Cr15CoMoV steel. Here you get Damascus aesthetics and performance that rivals much more expensive knives.
• For the demanding enthusiast: Our series with Japanese VG-10 steel, such as Shojin Taru, are an unrivaled choice that offer the recognized balance that professional chefs love.
• For ultimate, uncompromising performance: Choose a knife from the Shojin Kashi series with SG2 powdered steel. This is the pinnacle of knife technology for those who want only the very best.

Regardless of which knife you choose, remember that regular maintenance with a sharpening steel and proper storage are crucial to maintaining your knife's optimal performance for many years to come.