Yield strength of deep drawn 304

[dgallup]

I'm looking for a representative yield strength for a deep drawn part made from 304L. I don't know the exact reduction yet as we are just in the concept phase. MatWEB gives values based on % Cold Rolled. Can I use these? I would expect the 20% cold rolled to be conservative (690 MPa). Also, MatWEB lists 0% cold rolled yeild strength as 290 MPa but annealed yeild strength as only 170 MPa. Is the 0% cold rolled still somewhat work hardened?

 

[EdStainless]

If you have sheet that is either 2D or 2B finish then it will have a temper pass and the yield will come up slightly.

Looking at the range of strengths from 10% to 25% should give you a good picture of what you are likely to see.

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[mcguire]

304L in the 2D condition, as you should have it for deep drawing, will have a yield strength of about 250 MPa.
The hardening will depend on the local deformation. You can determine how much deformation you will get by looking at the thickness change in the section of the drawn part that's relevant for your purposes. 20% reduction should give you about a 300 to 400 MPa increse in yield strength, depending on alloy composition and drawing temperature. Interpolate from there.

Michael McGuire

http://stainlesssteelforengineers.blogspot.com/

 

[dgallup]

Thanks guys. I need a minimum of 220 MPa yield strength in the as drawn condition + a nice safety factor. Sounds like we are going to be OK.