Rockwell Hardness

[Harpoon1]

Where can one find the Rockwell Hardness for each particular model/steel combination? Starting with for example the Para2 and CTS-20CP?

 

[The Deacon]

As a general rule you can't. Spyderco does not publish Rockwell numbers.

 

[spydusse]

I would guess cts 20cp to be 59-60

 

[Mud Shrimp Moe]

I have a question on Rockwell hardness as well. Is the scale linear or what?

In other words, is a Rockwell hardness #57 blade 57/60ths of the hardness of a #60 blade?

 

[RevDevil]

I have a question on Rockwell hardness as well. Is the scale linear or what?

In other words, is a Rockwell hardness #57 blade 57/60ths of the hardness of a #60 blade?

What?

 

[CrimsonTideShooter]

I have a question on Rockwell hardness as well. Is the scale linear or what?

In other words, is a Rockwell hardness #57 blade 57/60ths of the hardness of a #60 blade?

I have no idea what you're trying to ask in your second question, but no the HRC scale is not linear. It's logarithmic.

 

[pwet]

he is asking if a 60hrc blade is 3/60th harder than a 57hrc one ... that's clear.

or to make it base 100 if there's a 5% performance difference between a 57 and 60hrc blade.

 

[Jason B.]

I have no idea what you're trying to ask in your second question, but no the HRC scale is not linear. It's logarithmic.

Actually its not. It would seem from the test method and our perception of hardness that its logarithmic but it is linear.