Glossary

Hydrogen Reduction Steelmaking (HRS)

Written by one to ONE Holdings | Nov 10, 2025 11:22:05 PM

Hydrogen Reduction Steelmaking (HRS), often referred to as H2-DRI (Hydrogen Direct Reduced Iron), is the most crucial low-carbon pathway for the primary steel industry.

It involves using hydrogen gas rather than carbon-based reductants such as coal to remove oxygen from iron ore. This process produces only water vapour (H₂O) as a byproduct, effectively eliminating the massive CO₂ emissions associated with traditional Blast Furnaces.

The key challenge lies in scaling up green hydrogen production using renewable electricity economically and integrating this new process with the Electric Arc Furnace (EAF) route to achieve high-quality steel production globally. HRS is indispensable for the industry to meet its 2050 net-zero commitments.