What is FC61 Steel?
When properly heat-treated and tempered, the steel makes tough, durable, and corrosion resistance blades. FC61 steel is also used to manufacture high-end knives in Seki, Japan. It is ideal for razor blades and surgical knives too.
FC61 Steel Composition (FC61 Steel Chart)
- Carbon C 0.68%: Increases edge retention, hardness, and tensile strength. It also improves steel resistance to wear, abrasion, and corrosion.
- Chromium Cr 13.00%: Formation of Chromium carbides. Increases the blade’s hardness, tensile strength, and corrosion resistance.
- Manganese Mn 0.70%: improves the strength and hardness of steel. When the steel is heat-treated, hardenability is improved with increased manganese.
- Silicon Si 0.4%: Increases strength and heat resistance.
- Sulfur S 0.01%: Improves machinability it is regarded as an impurity and may affect the performance of the steel.
- Phosphorous P 0.02%: Increases the strength and improves the machinability of steel but is regarded as an impurity.
Properties of FC61 steel
FC61 Steel Hardness
FC61 stainless steel exhibits a Rockwell hardness of up to 61HRC. The achieved hardness varies with the heat treatment technique and the tempering time of the manufacturer. High hardness positively influences properties like edge retention and wear resistance of the blade steel.
FC61 Steel Edge retention
With a Rockwell hardness of 61HRC, FC61 blade steel offers good edge retention though not the best out there, particularly in stainless steel. Its edge retention is enough to last several cuts but will need sharpening when constantly used.
FC61 Steel edge retention is lower than Japanese VG10 steel, also used in most kitchen knives but is at the same level as AUS 8 steel and 8Cr13MoV steel. It is, however, marginally better than German 1.4116 and X50CRMOV15 stainless steel.
FC61 Steel Wear resistance
With daily usage, knife blades are expected to wear and tear, and all types of steel blades bow to the effects of abrasion at some point. For that reason, it is essential to purchase a knife with excellent wear resistance properties, and FC61 knives fall into that category thanks to the high hardness.
Because of the high wear resistance, FC61 blades last for a long time, even with daily usage and frequent sharpening. To improve the lifespan of FC61 steel knives, you can stick to sharpening them with whetstones and avoiding automatic sharpeners.
FC61 Steel Toughness
The toughness of steel can sometimes be described as inversely proportional to its hardness. This means that steel with high hardness offers low toughness. FC61 stainless steel has a hardness of about 61 HRC; however, its toughness level is very high.
The high toughness can be attributed to the high purity of FC61 steel alloy composition, mainly composed of carbon and chromium with minimal impurities. This allows for the formation of fine-grained carbides, which significantly improves toughness and hardness at equal measure.
FC61 stainless steel toughness is better than most stainless steel; Its toughness level is equivalent/comparable to 14C28N steel, AEB-L steel, and LC200N steel. It beats VG10 blade steel, SG2 steel, and even powder Crucibles steels like S45VN and S30V.
FC61 Steel Corrosion resistance
FC61 steel is stainless steel with 13% chromium in its composition, and therefore, it does not rust or stain easily. If you are shopping for a knife in corrosive environments like in the kitchen or areas of high humidity and salty water, FC61 stainless steel knives will not disappoint.
Although the steel is resistant to rust, it can still rust if exposed to corrosive situations. For instance, you cannot leave the blades in water overnight and expect them not to rust. This calls for proper care and maintenance, which involves washing, cleaning, and drying the knives after use. Apply a coat of mineral oil on the blades and remove the sheath for long-term storage for extra protection.
FC61 steel corrosion resistance is comparable to Japanese AUS 8 steel, Nitro V steel, and CPM 154 stainless steel.
Ease of sharpening FC61 Steel
The ease of sharpening a knife blade is directly affected by its hardness. Therefore hard steels like FC61 are challenging to sharpen. Note that this does not mean that the blades will never take a sharp edge after dulling, but it will take you more time and energy to get a sharp edge.
An easier way to get a sharp edge with this steel is to use whetstones. You need to go through the different grades of whetstones for a sharper edge. You can start with a 400 grit to a 1000 grit to a 4000 grit until you get your desired sharpness.
FC61 steel comparison
FC61 steel vs VG10 steel
The main difference between FC61 Steel and VG10 steel is that FC61 steel offers twice the toughness of VG10 blade steel due to its pure alloy composition that greatly improves its toughness over most stainless and non-stainless steel. FC61 blade steel is less likely to break or chip when used on tougher things like cutting bones.
Both FC61 and VG10 knife steels offer good edge retention. However, VG10 steel contains higher amounts of carbon and has vanadium elements in its alloy composition, thus offering higher hardness, edge retention, and wear resistance due to the formation of hard vanadium carbides.
Both FC61 and VG10 are stainless steels; however, Japanese VG10 steel contains a higher amount of chromium elements in its alloy composition hence offering slightly better corrosion resistance.
FC61 steel vs SG2 (FC61 vs MC63)
Henckels uses SG2 Steel under its proprietary name MC63 steel, just like it uses Sandvik 13C26 Steel under its proprietary name FC61 steel. The main difference between FC61 steel and SG2 (Super Gold 2) steel is that FC61 Stainless Steel offers twice the toughness levels of SG2 stainless steel. SG2 stainless steel, on the contrary, offers better edge retention and corrosion compared to FC61 steel.
The high toughness achieved by FC61 Steel is due to its highly pure alloy composition, which lacks other elements like vanadium and has very few impurities in the form of phosphorus or sulfur. The highly pure chemical composition allows the grain of FC61 steel to be extremely fine and thus have better toughness.
SG2 steel, on the other hand, offers better edge retention due to its alloy composition containing high carbon percentage and other elements like vanadium which are responsible for the formation of hard vanadium carbides that are excellent when it comes to edge retention.
SG2 stainless steel also offers slightly better corrosion resistance due to a high amount of chromium elements in its alloy composition than FC61 steel. The difference in corrosion resistance between these two blade steels is not noticeable in daily application.
Is FC61 good knife steel?
Check out this Miyabi 6.5-inch FC61 steel Nakiri knife. Something that makes it stand out from the crowd is the heat treatment techniques used on it. It achieves 61HRC and maintains an exceptionally thin blade close to Usuba level.
- Multipurpose Knife Set: This kitchen knives set includes 8" Chef Knife, 8" Slicing Knife, 7" Santoku Knife, 8" Serrated Bread Knife, 5" Utility Knife, 3.5" Paring Knife, Kitchen Shears and 6 pcs Blade Guards
- Anti-rust coating: The healthy anti-rust coating protects the knife from oxidation and dishwasher safe, while the non-stick coating ensures the blades stay clean all day long
- Easy to carry: Each knife comes with a blade guard for safe, compact storage in your kitchen cupboard. These knives are also easy to carry when camping or storing in your RV
- Perfect Holiday Gift: Ideal for kitchen enthusiasts or new cooks, this knife set meets all cooking needs. It makes an excellent holiday gift for family, friends, lover and colleague
- Lifetime Warranty: Every knife set is backed by rigorous quality inspection, we provide a lifetime warranty for every customer, ensuring superior customer service and peace of mind with every purchase
- ULTRA-SHARP BLADES: Superior professional-level sharpness that ensures precision cutting.
- THE LAST KNIFE YOU’LL EVER NEED TO BUY: German Engineered Knife Informed by over 100 Years of Mastery. HENCKELS knives are built to last.
- EFFORTLESS CUTTING: Enjoy easy cutting with minimal effort with this lightweight, easy-to-use knife.
- SET INCLUDES: 3-inch paring knife, 5-inch serrated utility knife, 7-inch santoku knife hollow edge, 8-inch chef's knife, 8-inch bread knife, 4.5-inch steak knife set of 6, professional honing steel, kitchen shears, and hardwood knife block
- QUICK CLEAN UP: No-fuss cleanup, in the dishwasher or by hand. Stain and rust-free blades.
- 【Precision Forging, Effortless Cutting】Experience the smooth cutting performance of Cuts Like Butter, forged by the renowned XYJ workshop with over 40 years of heritage. This professional boning knife is meticulously crafted for exceptional sharpness and perfect balance, making it an indispensable tool for both kitchen enthusiasts and outdoor adventures.
- 【The Perfect Holiday Gift for Culinary Lovers】Make this holiday season unforgettable with the perfect culinary gift. Expertly packaged in a sophisticated gift box, this knife set is the ideal choice for Thanksgiving, Christmas, Father's Day, Mother's Day, birthdays, and housewarming parties. It’s a thoughtful and impressive present for home cooks, professional chefs, and grilling masters.
- 【Masterfully Forged High-Carbon Steel Core】At the heart of this chef knife lies a hand-forged, high-carbon steel blade, meticulously crafted by skilled artisans. This superior material and time-honored technique create an exceptionally sharp, resilient edge that stays sharper longer, resisting wear far better than ordinary knives. The distinctive hammered texture (Tsuchime) not only adds a unique aesthetic but also effectively minimizes food sticking, ensuring smoother, cleaner, and more effortless cuts through all your ingredients.
- 【Full Tang Ergonomic Chef Knife Handle】Designed for comfort and control during long prep sessions. The full tang wooden handle offers a secure, non-slip grip and superior balance, reducing hand strain and providing precise control—whether slicing, dicing, or chopping.
- 【Simple Care for Lasting Performance】To maintain the blade's premium condition, we recommend hand washing and drying it promptly. For long-term storage, apply a light coat of food-safe oil. With proper care, your Cuts Like Butter knife will retain its razor-sharp edge and beauty, making it a durable and cherished gift for years to come.
