Asia-Pacific is the largest consumer (55% of global demand), driven by China's construction and manufacturing sectors. China alone accounts for 40% of global round steel use, primarily in infrastructure (bridges, railways) and automotive production. Europe (20%) and North America (15%) follow, with demand focused on machinery, aerospace, and renewable energy (wind turbine shafts). Emerging markets in Africa and South America are growing (5-7% annually) due to urbanization and infrastructure investment, with demand for low-cost carbon steel rounds.