Benjamin Kamon

1.2519 is the classic German oil-hardening Cr-W-V tool steel — close kin to AISI O7 and a sister to 1.2419, with a touch more vanadium for finer carbides. The tungsten and chromium combine to produce hard, finely dispersed carbides that allow a thin geometry to hold an edge longer than the simple carbons, while the vanadium keeps grain size tidy through the heat treat.

In a kitchen knife, it lands comfortably between 62 and 64 HRC and behaves like a slightly more wear-resistant W2 — that is, it sharpens with little fuss on most stones, takes a fine edge, and rewards a deliberate heat treatment more than it punishes a casual one. It will patina, sometimes attractively, sometimes alarmingly to a first-time carbon owner; either way, a wipe-and-dry habit is enough to keep it civil.

You will find 1.2519 in the work of European bladesmiths who want a step up in edge retention from white-paper carbons without losing the easy stone feel. Among the makers Modern Cooking carries, Benjamin Kamon, Martin Huber, Tobias Heldqvist, Jonas Johnsson, and MCx work in 1.2519. It is one of the more honest "European answers to Aogami" — not the same metallurgy, but a similar relationship between feel at the stone and edge longevity.

Apex Ultra is one of the most carefully engineered non-stainless kitchen knife steels in modern circulation, and the project of an Austrian smith — Tobias Hangler — who set out, with Marco Guldimann, to design a steel for the kitchen rather than borrow one from another industry. It carries roughly 1.25 percent carbon, around four percent chromium, modest tungsten and molybdenum, and a small vanadium addition. The composition is tuned to produce a fine, evenly distributed carbide structure that supports hardness up to 67 HRC while delivering toughness comparable to 52100 at the same hardness — a combination that is the entire point of the steel.

What this means for a cook is unusual permission. You can ask a maker to grind an Apex Ultra knife thin enough that a White #1 owner would call you brave, then ask for the heat treatment to land at 65 HRC, and the resulting edge will hold for longer than Aogami Super without microchipping. It sharpens cleanly on natural and synthetic stones alike and patinas slowly because of the chromium content, though it is not stainless and should be treated as a carbon steel.

Apex Ultra has become a signature steel of the European maker community, and the Modern Cooking catalogue carries an unusually deep bench of smiths working in it. Tobias Hangler himself heads that group, alongside Marco Guldimann, Benjamin Kamon, Martin Huber, Jonas Johnsson, Karol Karyś, Birch & Bevel, and MCx. It is genuinely a step forward — one of the relatively few cases where the marketing claims and the underlying metallurgical data are saying the same thing.