The information I found was on this pdf file page #13 http://www.a-sp.org/database/custom/hss_stampingDesignManual.pdf which I am finding not to be real accurate. Thanks for the information.
Thanks but I have reviewed that document and found the information lacking of chemical make up. Also, the Mpa is 586 when in fact I have been told it’s actually 550 thus the 550 designation. I was hoping to find a mill or supplier that had all the information readily available to look up for...