You can look up ASTM A320 L7 online and get many hits, very simple. This a carbon alloy steel which is around 29.9X10^6 psi, as CoryPad indicated already 207 GPa. You can also access the ASTM website and get the specification from them, although you must join the club as so to speak. I get the ones I need from a Japanese website, which are also multiple in number.