MIT Grad's New Steel Method Cuts Costs 25% in America

America hasn't made steel competitively in decades, forcing us to import most of what we need from other countries. That's about to change thanks to an MIT graduate who found a way to make steel faster, cheaper, and cleaner.

Laureen Meroueh founded Hertha Metals in 2022 after falling in love with the challenge of fixing one of America's most outdated industries. Her company uses natural gas and electricity instead of coal to turn iron ore into steel in a single step, eliminating the need for multiple massive furnaces and dangerous processing plants.

The numbers tell an exciting story. Hertha's process uses 30% less energy and costs 25% less to operate than traditional American steel mills. Since late 2024, their Houston pilot plant has been producing one ton of steel per day, proving the technology works in the real world.

Traditional steelmaking hasn't changed much in 300 years. Most countries still combine iron ore with coal in enormous blast furnaces, then move the molten metal to another furnace to burn off impurities. The process requires billion-dollar facilities and produces massive emissions.

Meroueh's innovation combines all those steps into one continuous electric arc furnace. "Many reactions that were previously run sequentially through a conventional steelmaking process are now occurring simultaneously, within a single furnace," she explains.

America currently relies on imports for about 90% of the pig iron needed to make quality steel. We only have 11 operational blast furnaces left in the entire country. That dependence on global trade leaves our infrastructure, defense systems, and energy grid vulnerable to geopolitical shifts.

This year, Hertha will begin construction on a plant that can produce 10,000 tons of steel annually. The facility will reach full capacity by the end of 2027 and will also produce high-purity iron for magnets, helping America onshore another critical material we currently import.

The technology can even run on hydrogen instead of natural gas, making it ready for a zero-emissions future. Meroueh developed her expertise through MIT's mechanical engineering program, studying metallurgy and hydrogen production before becoming an Innovators Fellow at Breakthrough Energy.

The Ripple Effect

Making steel competitively in America again means more than just economics. Steel forms the backbone of everything from bridges to wind turbines to military equipment. When we can produce it ourselves, we gain independence from supply chain disruptions and strengthen our manufacturing base. Hertha's success could spark a renaissance in American heavy industry, creating jobs and inspiring other entrepreneurs to modernize sectors we thought were stuck in the past.

The company named itself after Hertha Ayrton, a 19th-century physicist who advanced our understanding of electric arcs. Now her namesake company is using that same technology to bring American steelmaking into the 21st century.