CPM 154
CPM 154 is the powder-metallurgy version of the classic stainless steel 154CM, remade with Crucible’s fine-grain PM process. The chemistry is essentially the same as 154CM, but the finer, more uniform carbide structure gives CPM 154 noticeably better toughness, easier grinding, and a nicer finish than the original ingot-cast steel. It has been a workhorse stainless for custom and production knives for decades.
CPM 154 FAQ
What is the difference between CPM 154 and 154CM?
They share the same alloy recipe. CPM 154 is made using Crucible’s powder-metallurgy process, giving it a finer, more consistent grain than conventionally-melted 154CM. See the full breakdown: CPM 154 vs 154CM.
What hardness does CPM 154 reach?
Most knives run between 58 and 61 Rc. See the heat treat details further down this page for the full recipe.
Is CPM 154 hard to sharpen?
No, it is one of the easier premium stainless steels to sharpen. See the full grinding and sharpening guide.
Does CPM 154 rust?
It offers good, dependable stainless corrosion resistance from its 14% chromium content, suitable for everyday-carry and outdoor use.
Also known as: CPM-154, CPM154
Composition
| Carbon (C) | 1.05% |
| Chromium (Cr) | 14.00% |
| Molybdenum (Mo) | 4.00% |
| Vanadium (V) | 0.40% max (residual) |
Properties
| Property | Rating | Notes |
|---|---|---|
| Toughness | ★★★☆☆ | Solid for a stainless tool steel and a clear step up from conventional 154CM thanks to its finer PM carbide structure, though it trails newer higher-alloy steels like S35VN or MagnaCut in outright toughness. |
| Edge Retention | ★★★☆☆ | Better edge retention and chipping resistance than 440C, and a dependable middle-of-the-pack performer among modern stainless steels. Not a high-vanadium wear-resistance leader, but very well balanced. |
| Corrosion Resistance | ★★★★☆ | A true stainless steel with 14% chromium, giving it strong, dependable corrosion resistance suitable for kitchen, EDC, and outdoor use with normal care. |
| Machinability / Grinding | ★★★★☆ | One of CPM 154's signature strengths: it grinds and finishes noticeably easier than most modern stainless PM steels, which is part of why it remains popular with custom makers who hand-finish blades. |
Heat Treatment
Austenitize in the 1900-2000 F range, with 1950 F commonly cited as a toughness sweet spot; hold 30-60 minutes, then oil or plate quench. Temper twice, 2 hours minimum each cycle, aiming for 59-61 HRC for knife use (overall aim-hardness range is 55-62 HRC depending on application). Avoid tempering in the 800-1100 F range, which causes sensitization and reduces both corrosion resistance and toughness. A dry-ice freeze treatment after quench or between tempers helps fully transform retained austenite.
Best Uses
A dependable all-around stainless choice for EDC knives, kitchen cutlery, and custom work where easy finishing and a good balance of properties matter more than chasing maximum edge retention.
Sources: Crucible Industries, CPM 154 Data Sheet. Larrin Thomas, 154CM: Development, Properties, Use in Knives, and Legacy, Knife Steel Nerds, 2018. Larrin Thomas, How to Heat Treat CPM-154, Knife Steel Nerds, 2020.