What significant achievement is associated with Henry Bessemer?

The significant achievement associated with Henry Bessemer is the development of the Bessemer converter for steel manufacturing. This innovation revolutionized the production of steel, making it more efficient and cost-effective. The Bessemer converter allowed for the transformation of molten pig iron into high-quality steel by blowing air through the molten iron to remove impurities. This process significantly increased the production capacity and lowered the cost of steel, which in turn fueled the growth of industries such as construction, transportation, and manufacturing during the Industrial Revolution. The impact of Bessemer's invention is still felt today, as it laid the foundation for modern steel production techniques.