"Decarbonized Steel" is "Bessemer process homogenous wrought iron" and was sourced from Remington. Pages 503 & 504 of
The Parker Story state that Parker changed the name to "Plain Steel" as Remington was using the name "Decarbonized" on their newly introduced Model 1873 & 1875/1876 Hammer Lifter doubles.
This is different stuff than the "Gun Iron" barrels made from surplus musket barrels used on "Charles Parker Makers" guns.
c. 1866 Price List courtesy of Richard Hoover
"Best Gun Iron" barrels were listed in the 1869 Price List for the $50 grade; Decarbonized for the $75 grade.
