Carbon steel plates for construction are vital components in modern infrastructure, providing structural integrity and load bearing capacity for buildings, bridges, and civil engineering projects. These plates are selected for their balance of strength, durability, and cost effectiveness, with common grades including ASTM A36, EN S235, and JIS SS400. Chemical composition is optimized for construction applications, with moderate carbon content (0.15 0.25%) to ensure weldability and formability, while manganese enhances strength. Mechanical properties such as yield strength (235 355 MPa) and tensile strength (400 550 MPa) are tailored to withstand static and dynamic loads. Construction grade carbon steel plates undergo strict quality control, including ultrasonic testing for internal defects and surface inspection for flatness and uniformity. They are used in various construction elements: structural steel frames to support building loads, bridge girders and decks to withstand traffic and environmental forces, and foundation components to distribute loads to the ground. Formability is crucial for shaping plates into beams, columns, and complex structural members, often achieved through hot rolling or cold forming. Corrosion protection is essential for outdoor applications, with surface treatments like galvanizing or painting to extend service life. As construction projects demand higher safety and sustainability, carbon steel plates for construction continue to evolve, with advancements in high strength grades and eco friendly manufacturing processes.