eli5 How does razor blade dull on hairs when razor blades are made of steel and they are much higher on mohs scale?

Question

eli5 How does razor blade dull on hairs when razor blades are made of steel and they are much higher on mohs scale?

In: 4692

Answer 1

Mohs scale is not used for hardness (unless maybe you’re a geologist?). There’s a bunch of other hardness scales. Rockwell, Brunel, Vickers ,Knoop, etc. And the worst part is they’re not even comparable to each other really.

Hardness seems to be exceptionally difficult in metallurgy. Even within those scales there’s sort of sub scales. Rockwell B/C , brunel has a tungsten one.