Stainless Steel vs Carbon Steel Knives

Stainless steel knives are created by adding chromium to the iron and carbon mix during the forging process. Chromium is what makes the steel resistant to corrosion and staining. Other alloying elements, such as molybdenum, vanadium, or nickel, can also be added to improve durability, edge retention, and other performance characteristics.

The amount of chromium matters. Generally, a steel needs at least 10-13% chromium content to be considered stainless. Some stainless steels can handle being left out wet without any issues. Others may develop some spotting or light tarnishing over time, especially in humid environments or when exposed to saltwater.

Here's the important thing to remember: it's stain-LESS steel, not stain-PROOF steel. 

While these blades are far more resistant to rust and corrosion than carbon steel, they're not completely immune. You should still dry your knives after washing and never leave them soaking in the sink or run them through the dishwasher. It's not just a potential for spotting concern; it's a safety issue! Some knives that are considered stainless steel are sometimes marketed as "rust-resistant," because they will spot if not dried. 

MAC Japanese knives are a perfect example of technically stainless steel knives, marketed as rust-resistant, given they will spot if soaked in a sink or put through a dishwasher. Meanwhile, knives by Wusthof or Zwilling could never show a single micro spot, even if they were left in a hot tub for a weekend vacation!

Regardless of which stainless steel knife brand or steel type you decide to go with, if you get in the habit of keeping it dry while prepping and immediately after washing, you're setting yourself up with good habits for when you're ready to venture into the world of carbon steel knives.

There are a lot more stainless steel options than carbon steel these days. As their Rockwell hardness increases, the effort required to sharpen them changes. However, a lower Rockwell stainless steel knife that’s thick behind the edge can be harder to sharpen compared to a super thin, higher Rockwell knife that’s a laser!

• VG10
• VG1
• Chromova 18 (Global)
• X50 CrMoV 15 (Wusthof)
• Friodurx2 (Zwilling)
• FC61 (Zwilling/Miyabi)
• FC63 (Zwilling/Miyabi)
• SG2 Powdered Steel
• SPG STRIX
• MOVAX (Yaxell)
• AUS10a
• AEB-L
• 14C38
• S35VN
• Nitro V

And many more, but these are some of the most common you’ll find with kitchen knives. Keep in mind that many pocket and EDC knives are made with very different types of stainless steel you may have heard of, but they are intended for heavy abuse, not for cutting through peppers, onions, and chicken breast on wooden cutting boards!

Carbon Steel Advantages:

• Easier to sharpen: At the same or higher Rockwell hardness, carbon steel sharpens more easily than stainless steel. The steel responds better to whetstones, honing rods, and leather strops.
• Superior edge quality: Many experienced cooks prefer the edge feel and cutting performance of carbon steel (even if it doesn’t last as long as stainless steel).
• Develops character: The evolving patina that forms over time gives each knife a unique appearance that tells the story of its use.

Carbon Steel Disadvantages:

• Requires maintenance: Dry the blade immediately after use, keep it clean, and, for long-term storage, sometimes apply a light coat of mineral oil or petroleum jelly.
• Can rust: If left wet or neglected, carbon steel will rust and corrode. Not may, not can, it will!

Stainless Steel Advantages:

• Low maintenance: Wash it, dry it (or don’t), and you’re good to go. Stainless steel is forgiving.
• Resists corrosion: These knives can withstand moisture without rusting, making them ideal for busy kitchens or cooks who don’t want to worry about knife care constantly.
• Longer edge retention: While it's harder to sharpen, a properly heat-treated stainless steel blade can hold its edge slightly longer than a carbon steel blade at the same hardness.

Stainless Steel Disadvantages:

• Harder to sharpen: Chromium and other alloying elements make the steel more abrasion-resistant, which requires more effort to sharpen. However, a thin, laser of a stainless steel knife can be brought back to life in no time on a whetstone!
• Less responsive to honing: Some cooks feel that stainless steel doesn’t respond as well to honing or stropping. You’ll still get a cleaner edge, but compared to carbon steel, there's a consistent 15-30% decrease in responsiveness.

If you want to explore the world of carbon steel knives but want the least amount of exposed carbon steel with the potential to rust, consider a knife with a carbon steel core and stainless steel cladding. Many knives are monosteel, meaning the entire blade is made of a single steel type. However, San Mai blades or knives made with Damascus cladding are constructed of various types of steel that essentially sandwich a core steel, which can be stainless or carbon steel. 

If you decide to go with a knife with a carbon steel core and stainless steel cladding (whether that’s single-clad or Damascus), you only need to worry about the exposed core carbon steel at the edge developing a patina or potentially rusting. Now, you have the best of both worlds. If you’re looking at Japanese knives, you’ll find that today’s modern market offers plenty of carbon steel knives with stainless cladding.

The choice between carbon steel and stainless steel comes down to your priorities and how much attention you want to give your knives.

Choose carbon steel if:

• You enjoy the ritual of knife maintenance.
• You want a blade that’s easier to sharpen and hone, and returns to razor-sharp quickly.
• You appreciate the aesthetics and character of a knife with an evolving patina.
• You’re willing to wipe your blade while prepping, then dry it immediately after handwashing.

Choose stainless steel if:

• You want a low-maintenance knife that forgives occasional neglect.
• You prefer not to think about rust or patina.
• You work in a busy kitchen where knives don’t always get dried right away.
• You’re building your first quality knife collection and want something easy to use.

Both steel types can produce exceptional kitchen knives. Carbon steel isn’t “better” than stainless, and stainless isn’t “better” than carbon. They’re different tools with different characteristics. Understanding those differences before you buy ensures you’ll be happy with your knife for years to come.The bottom line? Carbon steel is easier to sharpen but requires more care. Stainless steel is easier to maintain but harder to sharpen. Pick the trade-off that matches your cooking style, and you’ll have a knife you love using every day.