Results are in

c. 1929 Sterlingworth Fluid Compressed Steel
Carbon .44%
Manganese .79%
Phosphorus .027%
Sulphur .038%
Nickel .04%
Chromium .03%
Molybdenum <.01%
Vanadium <.01%
AISI 1040
Tensile Strength psi
86,000 psi Yield...103,000 psi Ultimate

The Sterlingworth action was non-standard AISI 1020 with low concentrations of Chromium (.08%) and Nickel (.07%) compatible with the Ordnance Salvage Board steel listed above.

This might be of interest to the Fox fellas, and feel free to post on the Forum.