Surface finish
Carburizing hardens the surface of steel parts. The core stays tough while the case becomes very wear-resistant.
What it is
Carburizing is a heat treatment. Low-carbon steel parts are heated in a carbon-rich gas. Carbon diffuses into the surface. After quenching, the outer case becomes very hard while the inside stays soft and tough. This mix resists both wear and impact.
How it works
Heat in carbon gas
The part is heated to about 900–950 °C in a carbon-rich atmosphere.
Carbon diffusion
Carbon soaks into the surface to a set depth.
Quench
Rapid cooling locks in a hard surface case.
Temper
A low-temperature bake relieves stress and improves toughness.
Why choose it
Hard case stands up to friction and abrasion.
Improved resistance to repeated stress.
Soft core absorbs shock without cracking.
Parts last longer under load.
Typical specs
| Specification | Typical range / value | Notes |
|---|---|---|
| Case depth | 0.2 – 1.5 mm typical | |
| Surface hardness | 55 – 64 HRC | |
| Process temp | 900 – 950 °C | |
| Base material | Low-carbon / low-alloy steel |
Best applications
Transmission and drivetrain teeth.
Loaded rotating and pivot parts.
Raceways and rolling elements.
Components under rolling contact.
Materials
We apply Carburizing to the materials below. Not sure if your material qualifies? Our engineers will confirm it for free.
Our solution
We carburize low-carbon and alloy steels with controlled case depth and hardness. Every batch is tested for case depth and surface hardness.
Design tips
Leave stock for post-heat machining or grind.
Tell us areas that must stay soft.
Heat treat can cause slight warpage; allow for straightening.
FAQ