What are the common applications of different steel angle sizes? A3: Smaller steel angles (e.g., 20x20x3 mm) are often used in lightweight structural and decorative applications, while larger sizes (e.g., 150x150x15 mm) are used in heavy-duty structural frameworks, bridges, and towers. https://medium.com/@marketingsteel6/ms-tmt-bar-prices-an-in-depth-guide-to-cost-and-purchasing-strategies-b72b9457db5a