Austria's VG-10 rival, with superior corrosion, identical edge retention, and European heritage.
N690
For the Newcomer
N690 is Böhler's cobalt-enhanced stainless steel, Austria's premium kitchen knife steel, developed around 1998 as an evolution of 440C. The "N" is simply a Böhler product-family prefix; it does not stand for nitrogen. Its headline property is corrosion resistance: 17.3% chromium gives it the best of any steel in this group, officially approved for food contact and performing well even in marine and acidic environments where VG-10 would struggle. Edge retention and hardness are essentially equivalent to VG-10. The main difference is geography. VG-10 dominates the Japanese market; N690 dominates European custom knife making and is the primary steel of Sakai Takayuki's Grand Chef kitchen line.
About this composition
Cobalt's role here. In N690, A metal alloying element. In this steel it tightens the internal crystal structure so the blade can be hardened more reliably. "tightens the martensitic lattice so carbides distribute more uniformly," enabling hardening past 60 HRC consistently, even at lower austenitizing temperatures. This is more about manufacturing reliability than raw performance. Unlike VG-10, where cobalt's purpose is debated, N690's cobalt clearly aids its heat-treat flexibility.
17.3% Cr plus molybdenum pitting resistance. N690's ASTM G150 pitting index is "nearly double that of 440C thanks to molybdenum enrichment." Mo and Cr work in tandem: Mo replaces some Cr in the Microscopic hard particles within steel that resist wear. Their type and size shape how an edge wears and how fine it can get. phase, leaving more Cr in solid solution for corrosion protection.
Performance Deep Dive
Edge retention: Very good, essentially equivalent to VG-10.
Toughness: Moderate.
Charpy V-notch approximately 20 J at 20°C. Comparable to VG-10. Better than 440C. Not a toughness leader.
Corrosion resistance: Excellent, the best in this group for kitchen use.
17.3% Cr plus 1.1% Mo produces genuine resistance to acidic foods, salt, and humid environments. ASTM B117 salt spray: red rust after ~300 hours (vs. 240 for 154CM). Real-world: divers report no spotting after years of saltwater exposure.
Ease of sharpening: Good, similar to VG-10 and arguably slightly easier.
Chromium carbides (softer than vanadium carbides) respond well to standard whetstones. No significant deburring challenge.
Research Notes
N690 is significantly more common in EDC/outdoor knives (Todd Begg, Curtiss, Fox Knives, Extrema Ratio) than in kitchen knives. Sakai Takayuki's Grand Chef line is the primary production kitchen application. European custom makers use it for its polishability and availability.
In the Kitchen
N690 is the steel of choice for kitchens that beat up their cutlery: humid lines, coastal homes, and heavy acidic-prep workflows. The corrosion-resistance margin over VG-10 is real and shows up in the long term. It shines on gyutos and petties. Sakai Takayuki Grand Chef at $130–$200 is the best value point in the steel; for a more artisan take, Sabol Brothers' cryo-treated Katalox-handled gyutos are exceptional.
Composition
| Element | % | Role |
|---|---|---|
| Carbon (C) | 1.07 | High; hardness and carbide formation |
| Chromium (Cr) | 17.3 | The standout (highest in this group); exceptional corrosion baseline |
| Molybdenum (Mo) | 1.1 | Corrosion resistance (pitting); hardenability |
| Cobalt (Co) | 1.5 | Tightens martensitic lattice; enables higher hardness at lower austenitizing temp |
| Vanadium (V) | 0.1 | Minor; grain refinement |
| Silicon (Si) | 0.4 | Structural |
| Manganese (Mn) | 0.4 | Structural |
Steel family: Conventional ingot stainless. voestalpine Böhler Edelstahl GmbH & Co KG, Kapfenberg, Austria. Both Böhler and Uddeholm (Elmax, AEB-L) are voestalpine subsidiaries, two distinct steel cultures under one corporate roof.
Artisan Makers
| Maker | Knife | Style | Price | Link |
|---|---|---|---|---|
| Sakai Takayuki (Grand Chef) | Gyuto SP 240mm | Japanese-profile Western gyuto, HRC 60 | ~$200 | chefknivestogo.com |
| Sakai Takayuki (Grand Chef) | Petty 150mm | Japanese petty, HRC 60 | ~$130 | chefknivestogo.com |
| Sakai Takayuki (Grand Chef) | Gyuto 240mm | Japanese gyuto, HRC 61–62 | ~$139 | burrfectionstore.com |
| Sakai Takayuki (Grand Chef SP) | Gyuto | Japanese gyuto, HRC 59–60 | ~$179 | burrfectionstore.com |
| Due Buoi | 8.26" Chef Knife N690 | Western chef, HRC 60, EXTRA DURO heat treat | ~$122 | duebuoispatulastore.com |
| Sabol Brothers | 240mm Japanese-style Gyuto N690 | Japanese gyuto, Katalox octagonal handle, cryo-treated | ~$300–$450 | etsy.com |
| Pirge × KROP (Sinan Tansal) | 3-Piece Kitchen Set (180/140/110mm) | Handmade; 1500-yr-old oak handle; HRC 60 | varies | dellinger.cz |