Huntsman hot-rolled crucible steel process was introduced in 1742. To form a barrel, a sheet was folded over a mandrel and the long edge hammer welded.
Everything changed when the Bessemer process was patented in 1856, and when William Siemens established the Sample Steelworks to develop the Siemens-Martin Open Hearth process in 1865.
And that would be Ted's friend Monsieur Pierre-mile Martin wink

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