If MagnaCut is the balanced overachiever of blade steels, Maxamet is the obsessive specialist. It does one thing better than almost any other steel on the market — and it makes no apologies for the trade-offs.
What Is Maxamet?
Carpenter Maxamet is a high-speed tool steel adapted for knife blades. It was developed by Carpenter Technology and gained widespread attention in the knife world when Spyderco began using it on select models. With a carbon content around 2.15% and tungsten as a key alloying element, Maxamet sits in a category of its own among production knife steels.
Edge Retention: Best in Class
Maxamet's defining characteristic is edge retention that is simply unmatched by conventional stainless or even most super steels. In controlled edge retention testing, it consistently outperforms M390, S90V, and even MagnaCut by a significant margin. If holding an edge longer than any other steel is your priority, Maxamet is the answer.
For collectors who also use their knives for demanding cutting tasks, Maxamet delivers a working edge that lasts far longer between sharpenings than anything else in its class.
The Trade-Offs
Maxamet's extreme performance comes with real trade-offs that every collector should understand before buying:
- Corrosion resistance: Maxamet has very low corrosion resistance — it will rust quickly if exposed to moisture and not properly maintained. This is not a steel for wet environments or neglectful owners.
- Sharpening difficulty: Its extreme hardness (typically 68–70 HRC) makes it very challenging to sharpen. Diamond stones are a must; ceramic rods won't cut it.
- Brittleness: At high hardness levels, Maxamet is more brittle than tougher steels like S35VN or MagnaCut. It's not the right choice for hard-use or prying tasks.
Who Is Maxamet For?
Maxamet is for the collector or user who wants the absolute pinnacle of edge retention and is willing to manage the maintenance demands that come with it. It rewards disciplined care with performance that no other production steel can match.
It's also a genuine collector steel — knives in Maxamet are relatively rare, command attention in the community, and represent a meaningful point of difference in any collection.
Maxamet vs. MagnaCut
- Edge retention: Maxamet wins decisively
- Corrosion resistance: MagnaCut wins decisively
- Toughness: MagnaCut wins
- Sharpenability: MagnaCut wins
- Collector cachet: Both are highly regarded — for different reasons
They're not really competitors — they serve different collectors with different priorities.
The Bottom Line
Maxamet is not for everyone. But for the collector who wants the most extreme edge retention available in a production knife steel, nothing else comes close. It's a steel that demands respect — and rewards it.
Browse our full collection for current availability of knives in premium and exotic steels. If you have questions about a specific steel or piece, reach out — we're collectors too and love talking steel.