Unless you are breaking the parts Tensile Strength is irrelavant


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Posted by Dan Shockley on Friday, October 31, 2003 at 10:32PM :

In Reply to: Re: Weight Of Stainless Steel Plate...Anyone Here Know? posted by Willy-N on Friday, October 31, 2003 at 7:19PM :

As you can see from the following data, it depends if you are concerned about the material flexing or permanently deforming. The yield strengths are approimately the same. This indicates if you are concerned about the material permanetly deforming then you are not going to realize a marked improvement between 304 and a 6061 T6 Alumiunum alloy. However, there is a very significant difference the the modulus of elasticity (E). This is the property that indicated how a material bends, flexes, deforms, before permanent deformation begins. This basically indicates that the SS is 2.8 times as rigid. There is probably a much better way to eliminate flex than choosing a material with 2.91 time the density. (SS is 7.84 times the density of water, where, 6061 is 2.71) From this data, you would be better off, weight wise, to increase the thickness of the Aluminum than to choose stainless. I would be happy to provide more information offline.

6061 T6 Aluminum E=10.0*10^6 psi

Yield Strength (2% offset)= 35 ksi

304 SS E= 28.0 8 10^6 psi

Yield Strength (2% offset)= 35 ksi

Have a great day,
Dan





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