Steel matchup
ApexUltra and 26C3, compared on the five things that decide a blade: toughness, edge retention, corrosion, heat treat and how each one grinds.
The forger's super steel: developed openly by Larrin Thomas, Tobias Hangler and Marco Guldimann (released 2023) - ~1.25% C, 2.6% W, 1.5% Cr engineered to hold real toughness at 64-67 HRC with edge retention far beyond classic carbon steels, while still forging and quenching like one. Boutique priced, kitchen-blade focused, the most interesting carbon steel in decades.
Uddeholm's 'Spicy White': ~1.25% carbon, ultra-clean and nearly alloy-free - the Western take on Japanese White steel. Scary-keen fine edges at 62-66 HRC, superb razors and kitchen knives, gorgeous hamon capability. Wants a fast oil quench, modest wear resistance, zero rust resistance - the classic fine-carbon contract.
Dimension by dimension
Each steel's own note, its score out of five, and what separates the two in that one column. The higher score in a row is marked in purple.
| Dimension | ApexUltra | 26C3 | What separates them |
|---|---|---|---|
| Toughness | The headline is the curve: at 64-66 HRC it holds toughness classic steels lose by 62 - meaningfully tougher than 26C3, 1095 or 52100 run that hard. It is not a soft-spring chopper steel and was never meant to be; judge it at the hardness it was designed for, where nothing traditional keeps up. | Sane at sane hardness: 62-64 HRC kitchen and EDC slicers hold up fine with sensible geometry, and its clean grain helps. At razor hardness (65+) it is deliberately brittle. No chopping, no prying - this steel's job is keenness, and it does not moonlight. | ApexUltra, and by design: its tungsten-carbide chemistry holds working toughness at 65-66 HRC where 26C3 (and every classic fine steel) has gone brittle. Run both at 62 and the gap narrows toward even; the point of ApexUltra is that you do not have to run it at 62. |
| Edge retention | Far beyond every classic low-alloy steel - tungsten and vanadium carbides in a very hard matrix put it in genuine super-steel cutting company while staying forgeable. At 65-66 HRC thin kitchen edges stay screaming for a long time. | White-steel personality: the edge is extraordinary rather than long-lived. Fine carbides in a hard clean matrix cut aggressively and strop back to life in seconds, but abrasive media wears it faster than alloyed steels. Owners who enjoy sharpening call this a feature; they are not wrong. | ApexUltra, clearly - several times the wear resistance of any traditional low-alloy steel, from tungsten and vanadium carbides 26C3 simply does not have. 26C3 counters with the classic argument: its edge strops back in seconds and its keenness ceiling is as high as steel goes. |
| Corrosion resistance | Carbon steel, cares like one - 1.5% chromium is for carbides and hardenability, not stains. Patina, oil, dry storage: the standard contract, unchanged by the R&D. | None - 0.3% chromium is for hardenability, not stains. Flash rust on fresh grinds, spots overnight in humidity. Dry it, oil it, or patina it; kitchen owners get the wipe-immediately talk with every sale. | A tie at zero: both are honest carbon steels that rust on schedule. Patina, oil, dry storage - the contract is identical and neither pretends otherwise. |
| Heat treat | Open published protocols (Knife Steel Nerds / ApexUltra datasheet): forge high and thermal cycle with discipline; austenitize ~1475-1500°F, fast oil quench, temper twice ~300-350°F for 64-66 HRC (67 attainable). Kiln preferred for the numbers, forge possible with skill. No cryo required for excellent results. Decarb allowance as with any carbon steel. | Austenitize 1450-1475°F, short soak, quench in fast oil (Parks 50 class - shallow hardening; medium oils risk soft spots, more forgiving than true water steels), temper twice 300-400°F: ~64-66 HRC at the low end of tempering, 62-63 for working knives. Thermal cycle after forging for fine grain. Clay-quench hamon: excellent, W2's equal in crispness. | Both quench in fast oil at carbon-steel temperatures - but the personalities differ. 26C3 is shallow-hardening and hamon-brilliant (clay-quench first rank). ApexUltra is about precision: published open protocols, ~1475-1500°F, low tempers landing 64-67, kiln strongly preferred to cash the datasheet's checks. Hamon work belongs to 26C3; maximum-hardness engineering belongs to ApexUltra. |
| Grinding | Honest middle: forges and grinds harder than 1084-class (the tungsten announces itself at the anvil and the belt) but well within normal shop practice with sharp abrasives. Sharpening at full hardness rewards good stones; diamonds welcome, not required. | A pleasure. Annealed 26C3 saws, drills, files and grinds like the simple steel it is, and finishes to a fine polish quickly. Decarb is shallow; standard grinding allowance covers it. The whole shop experience is friendly right up until the quench wants speed. | 26C3 is friendlier everywhere - forges softer, grinds faster, finishes easier. ApexUltra's tungsten announces itself under the hammer and on the belt, and full-hardness sharpening rewards diamond stones. Neither approaches PM-stainless punishment; budget maybe half again the shop time for ApexUltra. |
Best use
ApexUltra
flagship forged gyutos and petties, high-hardness EDC, competition edges, spec-sheet-driven commissions.
Open the ApexUltra reference26C3
razors, hamon showpieces, traditional wa-handles kitchen work, keen-edge builds at accessible prices. The honest shop menu lists both.
Open the 26C3 reference
The long answer
The two steels a modern forged-kitchen-knife maker actually cross-shops. 26C3 is refined tradition — White-steel purity chasing perfect keenness. ApexUltra is engineered ambition — a 2023 clean-sheet design holding super-steel hardness and wear with carbon-steel forgeability. One optimizes the old recipe; the other rewrites it, at three-times-and-up the bar price.
Keep comparing
Keep reading
26C3 is bought for one reason — the finest edge simple steel takes — so its shop story is less about surviving the grind (easy) and more about not…
ApexUltra sits deliberately between worlds, and the shop experience matches: harder work than the classic carbon steels it forges like, far friendlier…
Every knife steel is iron plus a specific recipe of other elements, and each of those elements pulls the steel’s behavior in a particular direction…
Same bench
Whichever steel wins, the grind is only as flat as the platen behind it. I machine the parts, hand-assemble, track and test Torus grinders in Sterling, Illinois.
Current dual-axis platform with a fiber-laser-cut 6061 chassis and single-knob tracking.
Current dual-axis platform with a steel chassis, more mass and less vibration.
Prior-design aluminum chassis, 90-degree tilt and 1.5-inch tooling arms.
One-man shop
Tell me what the blade is for and how you heat treat, and I will tell you which of these I would put on the bench — including when the answer is neither.
