Wikimedia Commons New varieties of steel could make cars hundreds of pounds lighter and hundreds of dollars cheaper to run. Steelmaking is more than 2,000 years old, but major advances were made in the early 20th century as cars became mainstream. Regulatory changes since the 1960s pushed automakers to seek out stronger, lighter steel, while recent developments, involving higher-temperature furnaces, repeated heating and cooling, and high-pressure injection of water, create steels that are 10 times stronger than older types and are cheaper to produce. New steel alloys, incorporating titanium or niobium, also stabilize the structure. “It is a revolution,” an engineer told Knowable, and one that will be important as carmakers try to squeeze extra range out of heavy electric vehicles. |