440C is a classic stainless steel that was one of the top knife steels before the modern powder steels arrived. It is still used in many mid-range knives.
440C Steel at a Glance
| Type | Stainless steel |
|---|---|
| Made by | Many mills (AISI 440C) |
| Typical hardness | 57-60 HRC |
| Key elements | Carbon about 1.0 to 1.2%, chromium 16 to 18%, molybdenum up to 0.75% |
| Edge retention | 4/10 (modest) |
| Toughness | 4/10 (modest) |
| Rust resistance | 7/10 (very good) |
| Ease of sharpening | 6/10 (moderate) |
| Best for | Classic stainless folders |
Ratings are relative 1 to 10 scores for typical factory heat treatments. See how 440C ranks against 46 other steels in our Knife Steel Chart.
What Is 440C Steel?
440C has the most carbon of the 440 family. That lets it reach good hardness and wear resistance while staying stainless. Its large chromium carbides limit toughness compared with newer steels.
440C Steel Properties
- Edge retention: Modest.
- Toughness: Modest.
- Rust resistance: Very good.
- Ease of sharpening: Moderate.
440C Equivalents and Alternatives
9Cr18MoV is a close Chinese equivalent. 154CM and CPM 154 are common upgrades.
440C vs Other Steels
440C vs 440A
Compared with 440A, 440C holds an edge longer. 440A is slightly tougher, resists rust slightly better and is easier to sharpen. Read our 440A guide.
440C vs 154CM
Compared with 440C, 154CM holds an edge slightly longer. Read our 154CM guide.
440C vs D2
Compared with D2, 440C is slightly tougher, resists rust better and is easier to sharpen. D2 holds an edge longer. Read our D2 guide.
Is 440C Steel Good for Knives?
Yes, for mid-range knives where rust resistance matters. Modern steels like 14C28N or S35VN outperform it, but a good 440C knife still serves well.
Pros:
- Good rust resistance
- Decent edge retention
- Widely available
Cons:
- Limited toughness
- Outclassed by modern steels
Knives That Use 440C Steel
Makers sometimes change blade steels between versions, so check the listing to confirm the steel before you buy.
Frequently Asked Questions
Is 440C steel stainless?
Yes. 440C is a stainless steel, though no knife steel is completely rust proof. Wipe it dry after use.
How hard is 440C steel?
Knives in 440C are usually heat treated to around 57-60 HRC.
Is 440C easy to sharpen?
Moderate. Quality ceramic or diamond stones help.
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