What Is the Relationship Between a Materials Penetration Hardness and Its Ultimate Tensile Strength?

You may know that I am constantly on the hunt for good posts on Mechanical Engineering, understanding that a Mechanical Engineering is
required for the inf0.
I bumped into a really excellent post that explains Mechanical Engineering from a new perspective. Make sure you read this article and let me know how you feel. Today’s article is titled title and you can read the full article reproduced below for convenience:
Please explain this considering i am just a second year IE student
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Categories: Strength Of Materials Between, Hardness, Materials, Penetration, Relationship, Strength, Tensile, Ultimate