I failed to note that the Whitworth Fluid Compressed Steel was kept as a trade secret and few saw it prior to the protection lapsing circa 1884. I'm still not sure if Whitworth added any percentages, but with steel in a fluid state, the workers would compress a column(width not defined) of said steel 8 feet in height to a shorter height with the compression of 1.5" per foot in height in about 5 minutes. I would say then it was transformed into bar form. It is possible that for specific applications that there were molds that could compress the fluid steel. But as far as I can tell, then end user sourced the Whitworth steel in bar form. So S,D&G would have had to subcontract the transformation of the bar steel to a tube.
Kind Regards,
Raimey
rse
