Amazing what one might find on DoubleGunBBS smile courtesy of Walt Snyder in 2009

http://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=153034&page=all

A.P. Curtis, General Manager of the Ithaca Gun Co. requested composition analysis and tensile strength testing on a section “cut from a barrel made in Belgium” performed by E.J. Stormer, Racine, Wisconsin in 1919.
Courtesy of Walt Snyder.
Carbon .32%
Manganese .78%
Phosphorus .018%
Sulphur .033%
No chromium nor nickel
Tensile strength was “about 70,000” psi

This is very similar to a sample of Parker Titanic Steel recently analyzed and published in Parker Pages by Dave Suponski
Carbon .32%
Manganese .70%
Phosphorus .033%
Sulfer .077%
BUT the Titanic steel had .078% Nickel and .031% Chromium

Trojan Steel
Carbon .35%
Manganese .84%
Phosphorus .03%
Sulphur .025%
Nickel .04%
Chromium .02%

Unfortunately, the date of manufacture of neither barrel is known, and the composition may certainly have changed in the years after WWI.