That 9.78% nickel content is what gave it its Anti-Corro monicker.
Offhand I do not know if there is a corresponding ANSI number, but should be something close. Even in 1910, I would have figured the carbon content would have been higher than that 0.145%, more on the order of 0.45%, but that was just a guess.


Miller/TN
I Didn't Say Everything I Said, Yogi Berra