Timeline Friday 12 January 1855

Events on Friday 12 January 1855 1

• 1855 Bessemer process patented Henry Bessemer patents a cheap method for mass-producing steel British engineer Henry Bessemer patented a process for converting molten iron into steel by blowing air through it to remove impurities. The Bessemer process dramatically lowered the cost of steel production and became foundational to industrial-era construction, railways, and shipbuilding. It remained the dominant steelmaking method for decades.