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August 2006

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Subject:
From:
"David D. Hillman" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Fri, 25 Aug 2006 12:03:37 -0500
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Hi Charlie - for a steel alloy to be called "stainless" it must contain at
least 12% Cr. Most stainless steel alloys have designations as 2XX, 3XX,
4XX which refers to the type of stainless it is: ferritic, austenitic,
martensitic. Your 303 alloy is an austenitic stainless steel that is
commonly used for threaded applications. Each of the stainless steel types
have characteristics properties you need to match to your application. The
"18-10" stainless alloy could either be a generic description (18%Cr, 10%
some other element) or could be an 18% Cr - 10% Ni stainless steel alloy.
It is pretty hard to determine which alloy would work best without know a
number of other variables. Ask you vendor to get you the data sheets on
each to help with the decision. Good  Luck.

Dave Hillman
Rockwell Collins
[log in to unmask]



                                                                       
             Charlie Barker                                            
             <charlie.barker@S                                         
             UNTRONICINC.COM>                                           To
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             08/25/2006 10:59          [TN] 303 SS vs. 18-10 SS        
             AM                                                        
                                                                       
                                                                       
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              TechNet E-Mail                                           
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              Charlie Barker                                           
             <charlie.barker@S                                         
             UNTRONICINC.COM>                                          
                                                                       
                                                                       




Howdy;



Now that all have whetted their thirst for watery subjects, maybe one of
you wizards can help me on this:



What is the difference in the characteristics or quality, etc. of 18-10
stainless vs. 303 stainless?



We need some ¼-16 threaded 303 stainless PDQ. A local supplier can get us
some 18-10. Is it better?



This is used as a lead screw in an small industrial machine.



TIA



Charlie B.


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