Indeed.
Wm. Powell & Son used "Fluid-compressed" Whitworth steel for barrels in 1875. The first Purdey Pair Nos. 10614 & 10615 were delivered January 1, 1880 with the “New Whitworth Fluid Pressed Steel”.
Lefever Arms Co. was the first U.S. maker to supply Whitworth steel for their Optimus in 1887. Parker Bros. used Whitworth for the first AAH Pigeon Gun in 1894 SN 79964 delivered to Capt. Du Bray. Hunter Arms first offered Whitworth on the Monogram, A2, and A3 in 1895.
P. Webley & Son began using Siemens (similar to "mild" AISI 1020) steel barrels about 1880.
Hunter Arms was one of the earliest American maker to offer Fluid Steel on other than the highest grade guns. Crown steel first appeared with the Pigeon Grade in 1893, No. A 1 (SN 1130) in 1894, was also used for the No. 3 about 1895, and in 1898 for the No. 2.
Parker Titanic steel barrels were offered for Grades 3 - 6 from 1897 until the introduction of Acme steel for Grades 4 - 6 around 1910. The Grade 0 VH was introduced in 1899 with Vulcan steel, Parker Special Steel barrels appeared on the Grade 2 GH in 1908.
'Decarbonized Steel' barrels were offered by many U.S. makers by the late 1890s, some were “Special (Cold) Rolled Steel” to a higher tensile strength; Marlin & Winchester.
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