SAE J2340 550X

[kbtonkin]

Where does one find a simple and free listing of chemical makeup and mechanical properties of some steels? I am specifically seeking SAE J2340 550X.

 

[Goahead]

You may find data on this steel at

http://www.a-sp.org/database/custom/hss_stampingDesignManual.pdf

and also in the original document

SAE J2340
Revision: 99 Chg: Date: 10/00/99
CATEGORIZATION AND PROPERTIES OF DENT RESISTANT, HIGH STRENGTH, AND ULTRA HIGH STRENGTH AUTOMOTIVE SHEET STEEL

http://www.welding-advisers.com/

 

[kbtonkin]

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 those who may purchase.

 

[TVP]

kbtonkin,

First, the minimum yield strength requirement for grade 550X is 550 MPa, as stated in Table 4 of SAE J2340. I am not sure where you see the number 586.

Second, the reason there is a limited requirement for chemical composition is because this standard was specifically created to define performance criteria (strength, elongation) instead of tightly controlled chemical composition limits. These HSLA grades typically have C contents of ~ 0.06-0.10, Mn of ~ 1.00-1.5, and small additions of V, Nb, or Ti (around 0.05-0.10). All number are in mass percent.

Third, you can find more information from suppliers like US Steel, ISG, AK Steel, etc. Most of the steel suppliers reference ASTM standards like A 1011, but the products are essentially the same.

 

[kbtonkin]

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.