Below is a list of thread rolling material with proven rollability. The max hardness for thread rolling is 45 on the Rockwell C scale. As the material hardness approaches 45, the thread roll life diminishes.
- Case Hardening Nitriding
- Cast Iron with an elongation factor great than 8%
- Cast Steel
- Free Cutting
- Heat Treatable
- High Speed
- Malleable Iron
- Structural
- Stainless
- Tempered
- Tool Steel