True or False?

[Ironic]

They are normalized to the same hardness apart from a few steels that are exclusively at lower or higher hardness. Many steels have been tested at a range of hardness with different heat treatments of course. Ratings are a simplification for comparison.

So ratings wouldn’t necessarily remain consistent if different heat treat protocols are applied to the different steels. Makes sense, obviously. Hard to provide a ranking that accounts for those variables.