420J2 is a very common low-cost stainless steel. You will find it in budget knives, dive knives, scissors and some multi-tools.
420J2 Steel at a Glance
| Type | Stainless steel |
|---|---|
| Made by | Many mills (AISI 420 family) |
| Typical hardness | 50-54 HRC |
| Key elements | Carbon about 0.15 to 0.35%, chromium 12 to 14% |
| Edge retention | 1/10 (low) |
| Toughness | 6/10 (good) |
| Rust resistance | 8/10 (very good) |
| Ease of sharpening | 10/10 (very easy) |
| Best for | Budget and dive knives |
Ratings are relative 1 to 10 scores for typical factory heat treatments. See how 420J2 ranks against 46 other steels in our Knife Steel Chart.
What Is 420J2 Steel?
420J2 belongs to the 420 stainless family, with very little carbon. That makes it highly rust resistant and easy to sharpen, but too soft to keep a fine edge for long.
420J2 Steel Properties
- Edge retention: Low.
- Toughness: Good.
- Rust resistance: Very good. One of its main selling points, which is why it is used for dive knives.
- Ease of sharpening: Very easy.
420J2 vs Other Steels
420J2 vs 3Cr13
Compared with 3Cr13, 420J2 resists rust slightly better. Read our 3Cr13 guide.
420J2 vs 420HC
Compared with 420HC, 420J2 is slightly easier to sharpen. 420HC holds an edge slightly longer. Read our 420HC guide.
420J2 vs 8Cr13MoV
Compared with 8Cr13MoV, 420J2 is slightly tougher, resists rust slightly better and is easier to sharpen. 8Cr13MoV holds an edge longer. Read our 8Cr13MoV guide.
Is 420J2 Steel Good for Knives?
For wet environments and very cheap knives, 420J2 is fine. For an everyday knife, 420HC or 8Cr13MoV are better choices for little extra money.
Pros:
- Excellent rust resistance
- Very easy to sharpen
- Cheap
Cons:
- Poor edge retention
- Soft
Knives That Use 420J2 Steel
Makers sometimes change blade steels between versions, so check the listing to confirm the steel before you buy.
Frequently Asked Questions
Is 420J2 steel stainless?
Yes. 420J2 is a stainless steel, though no knife steel is completely rust proof. Wipe it dry after use.
How hard is 420J2 steel?
Knives in 420J2 are usually heat treated to around 50-54 HRC.
Is 420J2 easy to sharpen?
Very easy. Most standard stones and pull-through sharpeners work.