Originally Posted by hookahman1988
The thinness of a material doesn't affect its hardness. Hardness is determined by the bond strength of the atoms its composed of.
yes but you can deform things that are thinner and give the appearance of scratches and such, take a pencil and draw it across a piece of foil and you will have "damage" to the foil even though the pencil led is much softer
also mohs hardness is not a good way to determine metal since the heat treatment and work hardening of it will change the characteristics of it, granted not a huge amount with scratch resistance on some materials but on steel especially it can give some differences