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Shear strength of Stailess steel 1

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TMcRally

Automotive
Aug 17, 2007
155
Hi all

I am hoping someone can give me an approximation of the shear strength of a 304 stainless steel block. It bridges a gap of 4mm from the support to the first point of contact with the potentially moving part which it is the blocks job is to hold in place.

The X sectional area of the block is 650mm^2.

If you have a reference and a formula for this calculation it would be great so I don't have to ask again. ( I may need to change the gap it bridges to get the result I want)

Thanks
Dave
 
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Okay well 304 stainless has a tensile yield of about 215Mpa and for shear we can assume about half that value.
So multiply your shear area by 107Mpa to give the shearing force :-

Mpa= N/mm^2

so 650mm^2 x 107N/mm^2= 69550N force
 
depending on the geometry, the 4mm gap needs to be accounted for.
if it's a plate (or plate-like), it's loaded in bending.
 
So I guess the next question would be why do you need this number? Are you doing a stress analysis? Make sure you calculate max sheer and not just normal sheer. To make it complete, you should also calculate either max principal or Von Mises stress not just normal stress.

Tobalcane
"If you avoid failure, you also avoid success."
“Luck is where preparation meets opportunity”
 
Hi

Thanks for all the input.

The joint may never see it, but it can see a load of 2.2 tons or 20,000N (I know that doesn't quite calculate but I think it's close).

I went with a yield of 80,6360N. I used the 215Mpa x 0.577 x 650.

In practice I have seen it withstand this easily and has done so in NATA testing but they wanted some numbers so they could assess the safety factor.

Please let me know if I've got it wrong

Thanks again
 
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