What HRC hardness means for a knife
Written by Mattias Höög · Last updated
Short answer
HRC is the Rockwell C hardness scale. Most good carving knives are hardened to roughly 58–64 HRC. Higher hardness holds a thin edge longer, while lower hardness is usually tougher and easier to sharpen. The right number depends on the steel.
How it is measured
A Rockwell tester presses a diamond cone into the steel under a set load and measures how deep it goes. A shallower dent gives a higher number. Knife steel is typically measured on the C scale, written as HRC.
Hardness is a trade-off
Harder steel resists the edge bending or rolling, which matters on thin carving edges. But for a given steel, higher hardness usually lowers toughness, which increases the risk of chipping. Modern steels like Magnacut shift this trade-off, staying tough at high hardness.
Typical ranges
- Axes and heavy tools: about 55–58 HRC.
- General outdoor knives: about 57–60 HRC.
- Carving and whittling knives: about 59–64 HRC.
Frequently asked questions
- What is a good HRC for a carving knife?
- About 59–64 HRC is common. The best value depends on the steel and heat treatment.