SK5 is a Japanese carbon steel. Cold Steel has used it in many fixed blades, including the SRK.
SK5 Steel at a Glance
| Type | Carbon steel |
|---|---|
| Made by | Japanese mills (JIS SK5) |
| Typical hardness | 56-60 HRC |
| Key elements | Carbon about 0.8 to 0.9%, manganese about 0.5% |
| Edge retention | 3/10 (modest) |
| Toughness | 7/10 (very good) |
| Rust resistance | 1/10 (low) |
| Ease of sharpening | 9/10 (very easy) |
| Best for | Japanese outdoor knives |
Ratings are relative 1 to 10 scores for typical factory heat treatments. See how SK5 ranks against 46 other steels in our Knife Steel Chart.
What Is SK5 Steel?
SK5 is a Japanese tool steel grade with carbon content similar to American 1080 to 1084.
SK5 Steel Properties
- Edge retention: Modest.
- Toughness: Very good.
- Rust resistance: Low. Keep it dry and lightly oiled.
- Ease of sharpening: Very easy.
SK5 Equivalents and Alternatives
1080 and 1084 are close equivalents.
SK5 vs Other Steels
SK5 vs 1095
Compared with 1095, SK5 is slightly tougher. Read our 1095 guide.
SK5 vs 1084
Compared with SK5, 1084 is slightly tougher. Read our 1084 guide.
SK5 vs 80CrV2
Compared with SK5, 80CrV2 is tougher. Read our 80CrV2 guide.
Is SK5 Steel Good for Knives?
Yes, for outdoor fixed blades. Most are coated to resist rust.
Pros:
- Tough
- Easy to sharpen
Cons:
- Rusts easily
- Modest edge retention
Knives That Use SK5 Steel
Makers sometimes change blade steels between versions, so check the listing to confirm the steel before you buy.
Frequently Asked Questions
Is SK5 steel stainless?
No. SK5 is not stainless and will rust or patina if left wet. Keep it dry and lightly oiled.
How hard is SK5 steel?
Knives in SK5 are usually heat treated to around 56-60 HRC.
Is SK5 easy to sharpen?
Very easy. Most standard stones and pull-through sharpeners work.