the.com/steel
the only thing tougher than iron is iron that learned discipline
means A strong, hard alloy of iron and a small amount of carbon, used for tools, blades, construction, and anything that needs to bear weight without bending.
from From Old English 'stēli' or 'style,' tracing back to a Proto-Germanic root 'stahlją' (compare German 'Stahl' and Dutch 'staal'). That Germanic word likely meant something like 'standing firm' or 'firm thing,' possibly from an even older root suggesting solidity — fitting, since steel is iron made stubborn. The verb sense, as in 'steel yourself,' is younger and metaphorical: to harden your nerve the way a smith hardens a blade.
- mostly iron
- Steel is iron with a pinch of carbon, under 2%
- infinitely reborn
- Most recycled material on Earth, melted endlessly
- Damascus secret
- Ancient blades held carbon nanotubes, only found recently
- self-healing
- New alloys regrow cracks at room temperature
- skyscraper spine
- Skyscrapers exist because steel beats stone's weight
bessemer process — henry bessemer's 1856 invention that revolutionized steel production by removing impurities with forced air
pittsburgh steel — u.s. steel industry hub that produced 50% of america's steel in the early 1900s
krupp steel works — german industrial company that supplied armor plating and artillery shells for world war i and ii