August 13: The metal that refused to rust
On August 13, 1913, Harry Brearley cast the first commercially practical stainless steel in Sheffield. Tonight's film: Iron Man (2008).
There is a kind of date I keep coming back to in this almanac. The ones where somebody, in a small room, makes a material do something it has no business doing. August 13, 1913 is one of those. A Sheffield metallurgist named Harry Brearley, working at the Brown Firth Research Laboratories, switched on an electric furnace and cast a steel alloy with roughly 12.8 percent chromium and 0.24 percent carbon. He was not trying to change the world. He was trying to stop gun barrels from eroding.
The story I like is the accident. When Brearley tried to etch a sample with nitric acid for the microscope, the acid would not bite. He tried vinegar, then lemon juice. Same result. The alloy simply refused to corrode. He called it rustless steel, and Ernest Stuart, the cutlery manager at R.F. Mosley’s Portland Works, tried it in vinegar and renamed it stainless. The name stuck. The science was not magic. German researchers Monnartz and Borchers had already shown in 1911 that you needed at least 10.5 percent chromium for real corrosion resistance. Brearley’s contribution was to push the mix above that line, test it like a craftsman, and see what ordinary people could actually use it for. Sheffield’s cutlery trade was the first customer. Then everything else followed.
I work with software, not metal, but the pattern is the same one I recognize from any workshop worth its salt. You go in chasing one problem, you trip over something bigger. Brearley went in chasing gun barrels and walked out with the skin of the modern world, scalpels, sinks, surgical instruments, building facades, train carriages. And, eventually, fictional armor.
