[TheForge] Hardening steel

Fri Sep 6 15:09:00 2002

In a message dated 9/6/2002 1:11:02 PM Eastern Daylight Time, 
[email protected] writes:

> I will have to test this myself

Hi Bob,
  It is one of those things that don't seem to make sense at first look, but 
is the case.  If you look at a data sheet on most any grade of steel, you 
will see the Modulus is shown as a single number, not like tensile and yield 
strengths, which show the properties with differing tempering temperatures.  
I agree it still seems like it shouldn't be that way, but if you want to 
change the amount of bend or deflection under a given load, you need to 
change the cross section of the material, or change to a different material.  
The average modulus for steel is 29,000,000 which you get by dividing the 
stress (pounds per square inch) by the strain (inches per inch).  
Aluminum for example is only 10,000,000 (same as glass), Titanium 17,000,000, 
etc.
Good luck with your testing,
Mike Schermerhorn

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