> it was built using 400,000 tonnes of steel, enough to build 60 Eiffel Towers. ... | Hacker News

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		fouronnes on Oct 23, 2018 \| parent \| context \| favorite \| on: World's longest sea crossing: Hong Kong-Zhuhai bri... > it was built using 400,000 tonnes of steel, enough to build 60 Eiffel Towers. Except the Eiffel Tower is made of iron, not steel.

galago on Oct 23, 2018 [–]

I don't have a good source at the moment, but I think steel is somewhere around 97% iron by weight. The rest is carbon. Stainless steel has about 10% chromium.

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